Roman province
Encyclopedia
In Ancient Rome
Ancient Rome
Ancient Rome was a thriving civilization that grew on the Italian Peninsula as early as the 8th century BC. Located along the Mediterranean Sea and centered on the city of Rome, it expanded to one of the largest empires in the ancient world....

, a province (Latin, provincia, pl. provinciae) was the basic, and, until the Tetrarchy
Tetrarchy
The term Tetrarchy describes any system of government where power is divided among four individuals, but usually refers to the tetrarchy instituted by Roman Emperor Diocletian in 293, marking the end of the Crisis of the Third Century and the recovery of the Roman Empire...

 (c. 296), largest territorial and administrative unit of the empire's territorial possessions outside of Italy. The word province
Province
A province is a territorial unit, almost always an administrative division, within a country or state.-Etymology:The English word "province" is attested since about 1330 and derives from the 13th-century Old French "province," which itself comes from the Latin word "provincia," which referred to...

in modern English
English language
English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

 has its origins in the term used by the Romans.

Provinces were generally governed by politicians of senatorial
Roman Senate
The Senate of the Roman Republic was a political institution in the ancient Roman Republic, however, it was not an elected body, but one whose members were appointed by the consuls, and later by the censors. After a magistrate served his term in office, it usually was followed with automatic...

 rank, usually former consuls
Roman consul
A consul served in the highest elected political office of the Roman Republic.Each year, two consuls were elected together, to serve for a one-year term. Each consul was given veto power over his colleague and the officials would alternate each month...

 or former praetor
Praetor
Praetor was a title granted by the government of Ancient Rome to men acting in one of two official capacities: the commander of an army, usually in the field, or the named commander before mustering the army; and an elected magistratus assigned varied duties...

s. A later exception was the province of Egypt, incorporated by Augustus after the death of Cleopatra: it was ruled by a governor of equestrian rank only, perhaps as a discouragement to senatorial ambition. This exception was unique, but not contrary to Roman law, as Egypt was considered Augustus' personal property, following the tradition of earlier, Hellenistic kings.

Republican provinces

The term provincia originally designated simply a task or duty within the Roman state. Under the Roman Republic, the magistrates were elected to office for a period of one year, and those serving outside the city of Rome, like the consuls on campaign, were assigned a particular "province", an area of authority. The term did not acquire a definite territorial sense until Rome started expanding beyond Italy during the First Punic War
First Punic War
The First Punic War was the first of three wars fought between Ancient Carthage and the Roman Republic. For 23 years, the two powers struggled for supremacy in the western Mediterranean Sea, primarily on the Mediterranean island of Sicily and its surrounding waters but also to a lesser extent in...

, and the first permanent provinces (Sicily
Sicily
Sicily is a region of Italy, and is the largest island in the Mediterranean Sea. Along with the surrounding minor islands, it constitutes an autonomous region of Italy, the Regione Autonoma Siciliana Sicily has a rich and unique culture, especially with regard to the arts, music, literature,...

 in 241 BC and Sardinia
Sardinia
Sardinia is the second-largest island in the Mediterranean Sea . It is an autonomous region of Italy, and the nearest land masses are the French island of Corsica, the Italian Peninsula, Sicily, Tunisia and the Spanish Balearic Islands.The name Sardinia is from the pre-Roman noun *sard[],...

 in 237 BC) were set up.

At the beginning of each year, the provinces were distributed to future governors
Roman governor
A Roman governor was an official either elected or appointed to be the chief administrator of Roman law throughout one or more of the many provinces constituting the Roman Empire...

 by lots or direct appointment. Normally, the provinces where more trouble was expected—either from barbaric invasions
Migration Period
The Migration Period, also called the Barbarian Invasions , was a period of intensified human migration in Europe that occurred from c. 400 to 800 CE. This period marked the transition from Late Antiquity to the Early Middle Ages...

 or internal rebellions—were given to active or former consuls, men of the greatest prestige and experience, while the rest given to praetor
Praetor
Praetor was a title granted by the government of Ancient Rome to men acting in one of two official capacities: the commander of an army, usually in the field, or the named commander before mustering the army; and an elected magistratus assigned varied duties...

s and propraetors.

The distribution of the legions
Roman legion
A Roman legion normally indicates the basic ancient Roman army unit recruited specifically from Roman citizens. The organization of legions varied greatly over time but they were typically composed of perhaps 5,000 soldiers, divided into maniples and later into "cohorts"...

 across the provinces was also dependent on the amount of danger that they represented. In 14, for instance, the province of Lusitania
Lusitania
Lusitania or Hispania Lusitania was an ancient Roman province including approximately all of modern Portugal south of the Douro river and part of modern Spain . It was named after the Lusitani or Lusitanian people...

 had no permanent legion but Germania Inferior
Germania Inferior
Germania Inferior was a Roman province located on the left bank of the Rhine, in today's Luxembourg, southern Netherlands, parts of Belgium, and North Rhine-Westphalia left of the Rhine....

, where the Rhine frontier was still not pacified, had a garrison of four legions. These problematic provinces were the most desired by future governors. Problems meant war, and war could be expected to bring plunder, slaves to sell, and other opportunities for enrichment.

List of Republican provinces

  • 241 BC – Sicilia
    Sicilia (Roman province)
    Sicilia was the first province acquired by the Roman Republic, organized in 241 BC as a proconsular governed territory, in the aftermath of the First Punic War with Carthage. It included Sicily and Malta...

    , propraetorial province (senatorial from 27 BC)
  • 237 BC – Corsica et Sardinia
    Corsica et Sardinia
    Corsica et Sardinia was an ancient Roman province including the islands of Corsica and Sardinia.-Pre-Roman times:The Phoenicians were the first to establish several commercial stations in Corsica and in Sardinia. After the Phoenicians, there arrived the Greeks, who also established their colonies...

    , propraetorial province (senatorial from 27 BC)
  • 203 BC – Gallia Cisalpina, propraetorial province (merged with Italy c. 42 BC)
  • 197 BC – Hispania Citerior and Hispania Ulterior
    Hispania Ulterior
    During the Roman Republic, Hispania Ulterior was a region of Hispania roughly located in Baetica and in the Guadalquivir valley of modern Spain and extending to all of Lusitania and Gallaecia...

    , propraetorial provinces (imperial from 27 BC)
  • 167 BC – Illyricum
    Illyricum (Roman province)
    The Roman province of Illyricum or Illyris Romana or Illyris Barbara or Illyria Barbara replaced most of the region of Illyria. It stretched from the Drilon river in modern north Albania to Istria in the west and to the Sava river in the north. Salona functioned as its capital...

    , propraetorial province (imperial from 27 BC)
  • 146 BC – Macedonia, propraetorial province (senatorial from 27 BC)
  • 146 BC – Africa proconsularis, proconsular province (senatorial from 27 BC)
  • 129 BC – Asia, proconsular province (senatorial from 27 BC)
  • 120 BC – Gallia Transalpina (later Gallia Narbonensis
    Gallia Narbonensis
    Gallia Narbonensis was a Roman province located in what is now Languedoc and Provence, in southern France. It was also known as Gallia Transalpina , which was originally a designation for that part of Gaul lying across the Alps from Italia and it contained a western region known as Septimania...

    ), propraetorial province (senatorial from 27 BC)
  • 74 BC – Bithynia
    Bithynia
    Bithynia was an ancient region, kingdom and Roman province in the northwest of Asia Minor, adjoining the Propontis, the Thracian Bosporus and the Euxine .-Description:...

    , propraetorial province (senatorial from 27 BC)
  • 74 BC – Creta et Cyrenaica
    Creta et Cyrenaica
    Creta et Cyrenaica was a senatorial province of the Roman empire created in 20 BC. It comprised the island of Crete and the region of Cyrenaica in north Africa ....

    , propraetorial province (senatorial from 27 BC)
  • 66 BC – Corduene
    Corduene
    Corduene was an ancient region located in northern Mesopotamia and modern day Kurdish inhabited south east Turkey. It was a province of the Greater Armenia. It was referred to by the Greeks as Karduchia and by both the Greeks and Romans as Corduene...

     (imperial from 27 BC)
  • 64 BC – Cilicia
    Cilicia
    In antiquity, Cilicia was the south coastal region of Asia Minor, south of the central Anatolian plateau. It existed as a political entity from Hittite times into the Byzantine empire...

     et Cyprus
    Cyprus
    Cyprus , officially the Republic of Cyprus , is a Eurasian island country, member of the European Union, in the Eastern Mediterranean, east of Greece, south of Turkey, west of Syria and north of Egypt. It is the third largest island in the Mediterranean Sea.The earliest known human activity on the...

    , propraetorial province (senatorial from 27 BC)
  • 64 BC – Syria
    Syria (Roman province)
    Syria was a Roman province, annexed in 64 BC by Pompey, as a consequence of his military presence after pursuing victory in the Third Mithridatic War. It remained under Roman, and subsequently Byzantine, rule for seven centuries, until 637 when it fell to the Islamic conquests.- Principate :The...

    , propraetorial province (imperial from 27 BC)
  • 51 BC – Gallia Comata (divided in 22 BC)
  • 30 BC – Aegyptus, personal domain of Augustus
    Augustus
    Augustus ;23 September 63 BC – 19 August AD 14) is considered the first emperor of the Roman Empire, which he ruled alone from 27 BC until his death in 14 AD.The dates of his rule are contemporary dates; Augustus lived under two calendars, the Roman Republican until 45 BC, and the Julian...

    , getting a special governor styled Praefectus Aegypti
  • 29 BC – Moesia
    Moesia
    Moesia was an ancient region and later Roman province situated in the Balkans, along the south bank of the Danube River. It included territories of modern-day Southern Serbia , Northern Republic of Macedonia, Northern Bulgaria, Romanian Dobrudja, Southern Moldova, and Budjak .-History:In ancient...

    , propraetorial province (imperial from 27 BC)

Imperial provinces during the Principate

In the so-called Augustan Settlement of 27 BC, which established the Roman Empire
Roman Empire
The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

, the governance of the provinces was regulated. Octavian Caesar, having emerged from the Roman civil wars
Roman civil wars
There were several Roman civil wars, especially during the late Republic. The most famous of these are the war in the 40s BC between Julius Caesar and the optimate faction of the senatorial elite initially led by Pompey and the subsequent war between Caesar's successors, Octavian and Mark Antony in...

 as the undisputed victor and master of the Roman state, officially laid down his powers, and in theory restored the authority of the Roman Senate
Roman Senate
The Senate of the Roman Republic was a political institution in the ancient Roman Republic, however, it was not an elected body, but one whose members were appointed by the consuls, and later by the censors. After a magistrate served his term in office, it usually was followed with automatic...

. Octavian himself assumed the title "Augustus
Augustus (honorific)
Augustus , Latin for "majestic," "the increaser," or "venerable", was an Ancient Roman title, which was first held by Gaius Julius Caesar Augustus , and subsequently came to be considered one of the titles of what are now known as the Roman Emperors...

" and was given to govern, in addition to Egypt, the strategically important provinces of Gaul
Roman Gaul
Roman Gaul consisted of an area of provincial rule in the Roman Empire, in modern day France, Belgium, Luxembourg, and western Germany. Roman control of the area lasted for less than 500 years....

, Hispania
Hispania
Another theory holds that the name derives from Ezpanna, the Basque word for "border" or "edge", thus meaning the farthest area or place. Isidore of Sevilla considered Hispania derived from Hispalis....

 and Syria
Syria (Roman province)
Syria was a Roman province, annexed in 64 BC by Pompey, as a consequence of his military presence after pursuing victory in the Third Mithridatic War. It remained under Roman, and subsequently Byzantine, rule for seven centuries, until 637 when it fell to the Islamic conquests.- Principate :The...

 (including Cilicia
Cilicia
In antiquity, Cilicia was the south coastal region of Asia Minor, south of the central Anatolian plateau. It existed as a political entity from Hittite times into the Byzantine empire...

 and Cyprus
Cyprus
Cyprus , officially the Republic of Cyprus , is a Eurasian island country, member of the European Union, in the Eastern Mediterranean, east of Greece, south of Turkey, west of Syria and north of Egypt. It is the third largest island in the Mediterranean Sea.The earliest known human activity on the...

). Under Augustus, Roman provinces were classified as either senatorial or imperial, meaning that their governors were appointed by either the Senate or by the emperor. Generally, the older provinces that existed under the Republic were senatorial. Senatorial provinces were, as before under the Republic, governed by a proconsul
Proconsul
A proconsul was a governor of a province in the Roman Republic appointed for one year by the senate. In modern usage, the title has been used for a person from one country ruling another country or bluntly interfering in another country's internal affairs.-Ancient Rome:In the Roman Republic, a...

, who was chosen by lot among the ranks of senators who were ex-consuls or ex-praetors, depending on which province was assigned. The major imperial provinces were under a legatus Augusti pro praetore
Legatus Augusti pro praetore
A legatus Augusti pro praetore was the official title of the governor of some imperial provinces of the Roman Empire during the Principate era, normally the larger ones or those where legions were based...

, also a senator of consular or praetorian rank. Egypt and some smaller provinces where no legions were based were ruled by a procurator
Procurator (Roman)
A procurator was the title of various officials of the Roman Empire, posts mostly filled by equites . A procurator Augusti was the governor of the smaller imperial provinces...

(praefectus in Egypt), whom the emperor selected from non-senators of equestrian rank. The status of a province could change from time to time. In AD 68, of a total 36 provinces, 11 were senatorial and 25 imperial. Of the latter, 15 were under legati and 10 under procuratores or praefecti.

During the Principate, the number and size of provinces also changed, either through conquest or through the division of existing provinces. The larger or more heavily garrisoned provinces (for example Syria
Syria (Roman province)
Syria was a Roman province, annexed in 64 BC by Pompey, as a consequence of his military presence after pursuing victory in the Third Mithridatic War. It remained under Roman, and subsequently Byzantine, rule for seven centuries, until 637 when it fell to the Islamic conquests.- Principate :The...

 and Moesia
Moesia
Moesia was an ancient region and later Roman province situated in the Balkans, along the south bank of the Danube River. It included territories of modern-day Southern Serbia , Northern Republic of Macedonia, Northern Bulgaria, Romanian Dobrudja, Southern Moldova, and Budjak .-History:In ancient...

) were subdivided into smaller provinces to prevent any single governor from holding too much power.

List of provinces created during the Principate

  • 27 BC – Achaea
    Achaea (Roman province)
    Achaea, or Achaia, was a province of the Roman Empire, consisting of the Peloponnese, eastern Central Greece and parts of Thessaly. It bordered on the north by the provinces of Epirus vetus and Macedonia...

     separated from Macedonia, senatorial propraetorial province
  • 25 BC – Galatia
    Galatia (Roman province)
    Galatia was the name of a province of the Roman Empire in Anatolia . It was established by the first emperor, Augustus , in 25 BC, covering most of formerly independent Celtic Galatia, with its capital at Ancyra....

    , imperial propraetorial province
  • 22 BC – Gallia Comata divided into Gallia Aquitania
    Gallia Aquitania
    Gallia Aquitania was a province of the Roman Empire, bordered by the provinces of Gallia Lugdunensis, Gallia Narbonensis, and Hispania Tarraconensis...

    , Gallia Belgica
    Gallia Belgica
    Gallia Belgica was a Roman province located in what is now the southern part of the Netherlands, Belgium, Luxembourg, northeastern France, and western Germany. The indigenous population of Gallia Belgica, the Belgae, consisted of a mixture of Celtic and Germanic tribes...

    , Gallia Lugdunensis
    Gallia Lugdunensis
    Gallia Lugdunensis was a province of the Roman Empire in what is now the modern country of France, part of the Celtic territory of Gaul. It is named after its capital Lugdunum , possibly Roman Europe's major city west of Italy, and a major imperial mint...

    , imperial propraetorial provinces
  • 15 BC – Raetia
    Raetia
    Raetia was a province of the Roman Empire, named after the Rhaetian people. It was bounded on the west by the country of the Helvetii, on the east by Noricum, on the north by Vindelicia, on the west by Cisalpine Gaul and on south by Venetia et Histria...

    , imperial procuratorial province
  • c. 13 BC – Hispania Ulterior
    Hispania Ulterior
    During the Roman Republic, Hispania Ulterior was a region of Hispania roughly located in Baetica and in the Guadalquivir valley of modern Spain and extending to all of Lusitania and Gallaecia...

     divided into Baetica and Lusitania
    Lusitania
    Lusitania or Hispania Lusitania was an ancient Roman province including approximately all of modern Portugal south of the Douro river and part of modern Spain . It was named after the Lusitani or Lusitanian people...

     (senatorial propraetorial and imperial propraetorial respectively)
  • 12 BC – Germania Magna, lost after 9 AD
  • 6 AD – Iudaea
    Iudaea Province
    Judaea or Iudaea are terms used by historians to refer to the Roman province that extended over parts of the former regions of the Hasmonean and Herodian kingdoms of Israel...

    , imperial procuratorial province (renamed Syria Palaestina by Hadrian, and upgraded to proconsular province).
  • 14 – Alpes Maritimae
    Alpes Maritimae
    Alpes Maritimae was a province of the Roman Empire, one of three small provinces straddling the Alps between modern France and Italy...

    , imperial procuratorial province
  • 18 – Cappadocia
    Cappadocia (Roman province)
    Cappadocia was a province of the Roman empire in Anatolia , with its capital at Caesarea. It was established in 17 AD by the emperor Tiberius , following the death of Cappadocia's last king, Archelaus. It was an imperial province, meaning that its governor was directly appointed by the emperor...

    , imperial propraetorial (later proconsular) province
  • c. 20–50 – Illyricum
    Illyricum (Roman province)
    The Roman province of Illyricum or Illyris Romana or Illyris Barbara or Illyria Barbara replaced most of the region of Illyria. It stretched from the Drilon river in modern north Albania to Istria in the west and to the Sava river in the north. Salona functioned as its capital...

     divided into Illyricum Superior (Dalmatia
    Dalmatia
    Dalmatia is a historical region on the eastern coast of the Adriatic Sea. It stretches from the island of Rab in the northwest to the Bay of Kotor in the southeast. The hinterland, the Dalmatian Zagora, ranges from fifty kilometers in width in the north to just a few kilometers in the south....

    ) and Illyricum Inferior (Pannonia
    Pannonia
    Pannonia was an ancient province of the Roman Empire bounded north and east by the Danube, coterminous westward with Noricum and upper Italy, and southward with Dalmatia and upper Moesia....

    ), imperial proconsular provinces
  • 40 – Mauretania Tingitana
    Mauretania Tingitana
    Mauretania Tingitana was a Roman province located in northwestern Africa, coinciding roughly with the northern part of present-day Morocco. The province extended from the northern peninsula, opposite Gibraltar, to Chellah and Volubilis to the south, and as far east as the Oued Laou river. Its...

     and Mauretania Caesariensis
    Mauretania Caesariensis
    Mauretania Caesariensis was a Roman province located in northwestern Africa. It was the easternmost of the North African Roman provinces, mainly in present Algeria, with its capital at Caesarea , now Cherchell.-Historical background:In the first century AD, Roman...

    , imperial procuratorial provinces
  • c. 40 – Noricum
    Noricum
    Noricum, in ancient geography, was a Celtic kingdom stretching over the area of today's Austria and a part of Slovenia. It became a province of the Roman Empire...

    , imperial procuratorial province
  • 43 – Britannia
    Roman Britain
    Roman Britain was the part of the island of Great Britain controlled by the Roman Empire from AD 43 until ca. AD 410.The Romans referred to the imperial province as Britannia, which eventually comprised all of the island of Great Britain south of the fluid frontier with Caledonia...

    , imperial proconsular province
  • 43 – Lycia et Pamphylia
    Lycia et Pamphylia
    Lycia et Pamphylia was the name of a province of the Roman empire, located in southern Anatolia. It was created by the emperor Vespasianus , who merged Lycia, which was organized as a province in AD 43 by Claudius, and Pamphylia, which was a part of the province of Galatia, into a single...

    , imperial propraetorial province
  • 46 – Thracia
    Thrace
    Thrace is a historical and geographic area in southeast Europe. As a geographical concept, Thrace designates a region bounded by the Balkan Mountains on the north, Rhodope Mountains and the Aegean Sea on the south, and by the Black Sea and the Sea of Marmara on the east...

    , imperial procuratorial province
  • c. 47 – Alpes Poeninae, imperial procuratorial province
  • 63 – Alpes Cottiae
    Alpes Cottiae
    Alpes Cottiae was a province of the Roman Empire, one of three small provinces straddling the Alps between modern France and Italy. Its name survives in the modern Cottian Alps. In antiquity, the province's most important duty was the safeguarding of communications over the Alpine passes...

    , imperial procuratorial province
  • 67 – Epirus
    Epirus
    The name Epirus, from the Greek "Ήπειρος" meaning continent may refer to:-Geographical:* Epirus - a historical and geographical region of the southwestern Balkans, straddling modern Greece and Albania...

    , imperial procuratorial province
  • 72 – Commagene annexed to Syria
  • c. 84 – Germania Superior
    Germania Superior
    Germania Superior , so called for the reason that it lay upstream of Germania Inferior, was a province of the Roman Empire. It comprised an area of western Switzerland, the French Jura and Alsace regions, and southwestern Germany...

     and Germania Inferior
    Germania Inferior
    Germania Inferior was a Roman province located on the left bank of the Rhine, in today's Luxembourg, southern Netherlands, parts of Belgium, and North Rhine-Westphalia left of the Rhine....

    , imperial proconsular provinces
  • 85 – Moesia
    Moesia
    Moesia was an ancient region and later Roman province situated in the Balkans, along the south bank of the Danube River. It included territories of modern-day Southern Serbia , Northern Republic of Macedonia, Northern Bulgaria, Romanian Dobrudja, Southern Moldova, and Budjak .-History:In ancient...

     divided into Moesia Superior and Moesia Inferior, imperial proconsular provinces
  • 105 – Arabia
    Arabia Petraea
    Arabia Petraea, also called Provincia Arabia or simply Arabia, was a frontier province of the Roman Empire beginning in the 2nd century; it consisted of the former Nabataean kingdom in modern Jordan, southern modern Syria, the Sinai Peninsula and northwestern Saudi Arabia. Its capital was Petra...

    , imperial propraetorial province
  • 107 – Dacia
    Roman Dacia
    The Roman province of Dacia on the Balkans included the modern Romanian regions of Transylvania, Banat and Oltenia, and temporarily Muntenia and southern Moldova, but not the nearby regions of Moesia...

    , imperial proconsular province (split into Dacia Superior and Dacia Inferior between 118 and 158)
  • 107 – Pannonia
    Pannonia
    Pannonia was an ancient province of the Roman Empire bounded north and east by the Danube, coterminous westward with Noricum and upper Italy, and southward with Dalmatia and upper Moesia....

     divided into Pannonia Superior and Pannonia Inferior, imperial provinces (proconsular and propraetorial respectively)
  • c. 115 – Armenia
    Armenia
    Armenia , officially the Republic of Armenia , is a landlocked mountainous country in the Caucasus region of Eurasia...

    , Assyria
    Assyria (Roman province)
    Assyria or Assyria Provincia was a roman province that lasted only two years .-History:Assyria was one of three provinces created by the Roman emperor Trajan in 116 AD following a successful military campaign against Parthia, in present-day Iraq.Despite Rome's military victory, Trajan's province...

     and Mesopotamia
    Mesopotamia (Roman province)
    Mesopotamia was the name of two distinct Roman provinces, the one a short-lived creation of the Roman Emperor Trajan in 116–117 and the other established by Emperor Septimius Severus in ca. 198, which lasted until the Muslim conquests of the 7th century....

    , formed by Trajan
    Trajan
    Trajan , was Roman Emperor from 98 to 117 AD. Born into a non-patrician family in the province of Hispania Baetica, in Spain Trajan rose to prominence during the reign of emperor Domitian. Serving as a legatus legionis in Hispania Tarraconensis, in Spain, in 89 Trajan supported the emperor against...

    , abandoned by Hadrian
    Hadrian
    Hadrian , was Roman Emperor from 117 to 138. He is best known for building Hadrian's Wall, which marked the northern limit of Roman Britain. In Rome, he re-built the Pantheon and constructed the Temple of Venus and Roma. In addition to being emperor, Hadrian was a humanist and was philhellene in...

     in 118
  • 166 – Tres Daciae
    Roman Dacia
    The Roman province of Dacia on the Balkans included the modern Romanian regions of Transylvania, Banat and Oltenia, and temporarily Muntenia and southern Moldova, but not the nearby regions of Moesia...

     formed: Porolissensis, Apulensis and Malvensis, imperial procuratorial provinces
  • 193 – Syria
    Syria (Roman province)
    Syria was a Roman province, annexed in 64 BC by Pompey, as a consequence of his military presence after pursuing victory in the Third Mithridatic War. It remained under Roman, and subsequently Byzantine, rule for seven centuries, until 637 when it fell to the Islamic conquests.- Principate :The...

     divided into Syria Coele and Syria Phoenicia, imperial provinces (proconsular and propraetorial respectively)
  • 193 – Numidia
    Numidia
    Numidia was an ancient Berber kingdom in part of present-day Eastern Algeria and Western Tunisia in North Africa. It is known today as the Chawi-land, the land of the Chawi people , the direct descendants of the historical Numidians or the Massyles The kingdom began as a sovereign state and later...

     separated from Africa proconsularis, imperial propraetorial province
  • c. 197 – Mesopotamia
    Mesopotamia (Roman province)
    Mesopotamia was the name of two distinct Roman provinces, the one a short-lived creation of the Roman Emperor Trajan in 116–117 and the other established by Emperor Septimius Severus in ca. 198, which lasted until the Muslim conquests of the 7th century....

    , imperial praefectorial province
  • 197 (formalized c. 212) – Britannia
    Britannia
    Britannia is an ancient term for Great Britain, and also a female personification of the island. The name is Latin, and derives from the Greek form Prettanike or Brettaniai, which originally designated a collection of islands with individual names, including Albion or Great Britain. However, by the...

     divided into Britannia Superior
    Britannia Superior
    Britannia Superior was one of the provinces of Roman Britain created around 197 AD by Emperor Septimus Severus immediately after winning a civil war against Clodius Albinus, a war fought to determine who would be the next emperor. Albinus was the governor of Britannia during that civil war...

     and Britannia Inferior
    Britannia Inferior
    Britannia Inferior was a subdivision of the Roman province of Britannia established c. 214 by the emperor Caracalla, son of Septimius Severus. Located in modern northern England, the region was governed from the city of Eboracum by a praetorian legate in command of a single legion stationed in...

    , imperial provinces (proconsular and propraetorial respectively)
  • 214 AD – Osroene
    Osroene
    Osroene, also spelled Osrohene and Osrhoene and sometimes known by the name of its capital city, Edessa , was a historic Syriac kingdom located in Mesopotamia, which enjoyed semi-autonomy to complete independence from the years of 132 BC to AD 244.It was a Syriac-speaking kingdom.Osroene, or...


Many of the above provinces were under Roman military control or under the rule of Roman clients for a long time before being officially constituted as civil provinces. Only the date of the official formation of the province is marked above, not the date of conquest.

Diocletian's reforms

Emperor Diocletian
Diocletian
Diocletian |latinized]] upon his accession to Diocletian . c. 22 December 244  – 3 December 311), was a Roman Emperor from 284 to 305....

 introduced a radical reform known as the Tetrarchy
Tetrarchy
The term Tetrarchy describes any system of government where power is divided among four individuals, but usually refers to the tetrarchy instituted by Roman Emperor Diocletian in 293, marking the end of the Crisis of the Third Century and the recovery of the Roman Empire...

 (284–305), with a western and an eastern Augustus
Augustus (honorific)
Augustus , Latin for "majestic," "the increaser," or "venerable", was an Ancient Roman title, which was first held by Gaius Julius Caesar Augustus , and subsequently came to be considered one of the titles of what are now known as the Roman Emperors...

or senior emperor, each seconded by a junior emperor (and designated successor) styled Caesar
Caesar (title)
Caesar is a title of imperial character. It derives from the cognomen of Julius Caesar, the Roman dictator...

, and each of these four defending and administering a quarter of the Empire. In the 290s, Diocletian divided the Empire anew into almost a hundred provinces, including Italy. Their governors were hierarchically ranked, from the proconsul
Proconsul
A proconsul was a governor of a province in the Roman Republic appointed for one year by the senate. In modern usage, the title has been used for a person from one country ruling another country or bluntly interfering in another country's internal affairs.-Ancient Rome:In the Roman Republic, a...

s of Africa proconsularis and Asia through those governed by consulares
Consularis
Consularis is a Latin word, derived from consulo, "take counsel".-Roman history:Originally it was simple and adjective meaning "consular", but more interestingly it has also become a substantive, used in technical meanings.* Any former consul...

and corrector
Corrector
A corrector is a person who or object that practices correction, usually by removing or rectifying errors.The word is originally a Roman title corrector, derived from the Latin verb corrigēre, meaning "an action to rectify, to make right a wrong."Apart from the general sense of anyone who corrects...

es
to the praesides
Praeses
Praeses , is a Latin word meaning "Seated in front of, i.e. at the head ", has both ancient and modern uses.-Roman imperial use:...

. These last were the only ones recruited from the equestrian class
Equestrian (Roman)
The Roman equestrian order constituted the lower of the two aristocratic classes of ancient Rome, ranking below the patricians , a hereditary caste that monopolised political power during the regal era and during the early Republic . A member of the equestrian order was known as an eques...

. The provinces in turn were grouped into (originally twelve) dioceses
Roman diocese
A Roman or civil diocese was one of the administrative divisions of the later Roman Empire, starting with the Tetrarchy. It formed the intermediate level of government, grouping several provinces and being in turn subordinated to a praetorian prefecture....

, headed usually by a vicarius
Vicarius
Vicarius is a Latin word, meaning substitute or deputy. It is the root and origin of the English word "vicar" and cognate to the Persian word most familiar in the variant vizier....

, who oversaw their affairs. Only the proconsuls and the urban prefect of Rome (and later Constantinople) were exempt from this, and were directly subordinated to the tetrarchs.

Although the Caesars were soon eliminated from the picture, the four administrative resorts were restored in 318 by Emperor Constantine I, in the form of praetorian prefectures, whose holders generally rotated frequently, as in the usual magistracies but without a colleague. Constantine also created a second capital, Nova Roma, known after him as Constantinople
Constantinople
Constantinople was the capital of the Roman, Eastern Roman, Byzantine, Latin, and Ottoman Empires. Throughout most of the Middle Ages, Constantinople was Europe's largest and wealthiest city.-Names:...

, which became the permanent seat of the Eastern government. In Italy itself, Rome ceased to be the imperial residence, Mediolanum
Mediolanum
Mediolanum, the ancient Milan, was an important Celtic and then Roman centre of northern Italy. This article charts the history of the city from its settlement by the Insubres around 600 BC, through its conquest by the Romans and its development into a key centre of Western Christianity and capital...

 (modern Milan
Milan
Milan is the second-largest city in Italy and the capital city of the region of Lombardy and of the province of Milan. The city proper has a population of about 1.3 million, while its urban area, roughly coinciding with its administrative province and the bordering Province of Monza and Brianza ,...

) and later Ravenna
Ravenna
Ravenna is the capital city of the Province of Ravenna in the Emilia-Romagna region of Italy and the second largest comune in Italy by land area, although, at , it is little more than half the size of the largest comune, Rome...

 being favoured by the emperors. During the 4th century, the administrative structure was modified several times. Provinces and dioceses were split to form new ones, the praetorian prefecture of Illyricum
Praetorian prefecture of Illyricum
The praetorian prefecture of Illyricum was one of four praetorian prefectures into which the Late Roman Empire was divided.The administrative centre of the prefecture was Sirmium , and, after 379, Thessalonica...

 was abolished and reformed, and changed hands between East and West several times. In the end, with the death of Theodosius I in 395, the permanent division of the Empire into Western and Eastern halves was complete.

Detailed information on these arrangements is contained in the Notitia Dignitatum
Notitia Dignitatum
The Notitia Dignitatum is a unique document of the Roman imperial chanceries. One of the very few surviving documents of Roman government, it details the administrative organisation of the eastern and western empires, listing several thousand offices from the imperial court down to the provincial...

(Record of Offices), a document dating from the early 5th century. Most data is drawn from this authentic imperial source, as the names of the areas governed and titles of the governors are given there. There are however debates about the source of some data recorded in the , and it seems clear that some of its own sources are earlier than others.

It is interesting to compare this with the list of military territories under the duces
Dux
Dux is Latin for leader and later for Duke and its variant forms ....

, in charge of border garrisons on so-called limites
Limes
A limes was a border defense or delimiting system of Ancient Rome. It marked the boundaries of the Roman Empire.The Latin noun limes had a number of different meanings: a path or balk delimiting fields, a boundary line or marker, any road or path, any channel, such as a stream channel, or any...

, and the higher ranking , with more mobile forces, and the later, even higher magistri militum
Magister militum
Magister militum was a top-level military command used in the later Roman Empire, dating from the reign of Constantine. Used alone, the term referred to the senior military officer of the Empire...

.

In the longer surviving Eastern Empire, which is today conventionally labeled the Byzantine Empire
Byzantine Empire
The Byzantine Empire was the Eastern Roman Empire during the periods of Late Antiquity and the Middle Ages, centred on the capital of Constantinople. Known simply as the Roman Empire or Romania to its inhabitants and neighbours, the Empire was the direct continuation of the Ancient Roman State...

 to avoid scholarly confusion, this administrative subdivision was gradually changed. Justinian I made the first great changes in 534–536 by abolishing, in some provinces, the strict separation of civil and military authority that Diocletian had established. This process was continued on a larger scale with the creation of extraordinary Exarchates in the 580s and culminated with the adoption of the military theme system in the 640s, which replaced the older administrative arrangements entirely.

Praetorian prefecture of Galliae
Praetorian prefecture of Gaul
The praetorian prefecture of the Gauls was one of four large praetorian prefectures into which the Late Roman Empire was divided.- History :...

 

In Latin, Gallia was also sometimes used as a general term for all Celtic peoples
Celt
The Celts were a diverse group of tribal societies in Iron Age and Roman-era Europe who spoke Celtic languages.The earliest archaeological culture commonly accepted as Celtic, or rather Proto-Celtic, was the central European Hallstatt culture , named for the rich grave finds in Hallstatt, Austria....

 and their territories, such as all Brython
Brython
The Britons were the Celtic people culturally dominating Great Britain from the Iron Age through the Early Middle Ages. They spoke the Insular Celtic language known as British or Brythonic...

s, including Germanic and Iberian provinces that also had a population with a Celtic culture. The plural, Galliae in Latin, indicates that all of these are meant, not just Caesar's Gaul (several modern countries).

Diocese of Galliae
Diocese of Gaul
The Diocese of Gaul was a diocese of the later Roman Empire, under the praetorian prefecture of Gaul...

 

Galliae covered about half of the Gallic provinces of the early empire:
  • in what is now northern France, roughly the part north of the Loire
    Loire
    Loire is an administrative department in the east-central part of France occupying the River Loire's upper reaches.-History:Loire was created in 1793 when after just 3½ years the young Rhône-et-Loire department was split into two. This was a response to counter-Revolutionary activities in Lyon...

     (called after the capital Lugdunum, modern Lyon
    Lyon
    Lyon , is a city in east-central France in the Rhône-Alpes region, situated between Paris and Marseille. Lyon is located at from Paris, from Marseille, from Geneva, from Turin, and from Barcelona. The residents of the city are called Lyonnais....

    )
    • Gallia Lugdunensis
      Gallia Lugdunensis
      Gallia Lugdunensis was a province of the Roman Empire in what is now the modern country of France, part of the Celtic territory of Gaul. It is named after its capital Lugdunum , possibly Roman Europe's major city west of Italy, and a major imperial mint...

       I
    • Gallia Lugdenensis II
    • Gallia Lugdunensis III
    • Gallia Lugdunensis IV
  • in Belgium
    Belgium
    Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

    , Luxembourg
    Luxembourg
    Luxembourg , officially the Grand Duchy of Luxembourg , is a landlocked country in western Europe, bordered by Belgium, France, and Germany. It has two principal regions: the Oesling in the North as part of the Ardennes massif, and the Gutland in the south...

    , the parts of the Netherlands
    Netherlands
    The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

     on the left bank (west) of the Rhine
    • Belgica
      Gallia Belgica
      Gallia Belgica was a Roman province located in what is now the southern part of the Netherlands, Belgium, Luxembourg, northeastern France, and western Germany. The indigenous population of Gallia Belgica, the Belgae, consisted of a mixture of Celtic and Germanic tribes...

       I
    • Gallia Belgica II
  • Germany on the left bank (west) of the Rhine
    • Germania I
    • Germania II
  • the Helvetic tribe (parts of Switzerland
    Switzerland
    Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....

    ):
    • Alpes Poeninae et Graiae
    • Maxima Sequanorum

Diocese of Viennensis 

Viennensis was named after the city of Vienna (now Vienne
Vienne
Vienne is the northernmost département of the Poitou-Charentes region of France, named after the river Vienne.- Viennese history :Vienne is one of the original 83 departments, established on March 4, 1790 during the French Revolution. It was created from parts of the former provinces of Poitou,...

), and entirely in present-day France, roughly south of the Loire. It was originally part of Caesar's newly conquered province of Transalpine Gaul, but a separate diocese from the start.
  • Viennensis
    Vienne, Isère
    Vienne is a commune in south-eastern France, located south of Lyon, on the Rhône River. It is the second largest city after Grenoble in the Isère department, of which it is a subprefecture. The city's population was of 29,400 as of the 2001 census....

  • Alpes Maritimae
    Alpes Maritimae
    Alpes Maritimae was a province of the Roman Empire, one of three small provinces straddling the Alps between modern France and Italy...

  • Aquitanica
    Gallia Aquitania
    Gallia Aquitania was a province of the Roman Empire, bordered by the provinces of Gallia Lugdunensis, Gallia Narbonensis, and Hispania Tarraconensis...

     I
  • Aquitanica
    Gallia Aquitania
    Gallia Aquitania was a province of the Roman Empire, bordered by the provinces of Gallia Lugdunensis, Gallia Narbonensis, and Hispania Tarraconensis...

     II
  • Novempopulana
  • Narbonensis
    Gallia Narbonensis
    Gallia Narbonensis was a Roman province located in what is now Languedoc and Provence, in southern France. It was also known as Gallia Transalpina , which was originally a designation for that part of Gaul lying across the Alps from Italia and it contained a western region known as Septimania...

     I
  • Narbonensis II


In the fifth century, Viennensis was replaced by a diocese of Septem Provinciae ('7 Provinces') with similar boundaries.

Diocese of Hispaniae 

Hispania
Hispania
Another theory holds that the name derives from Ezpanna, the Basque word for "border" or "edge", thus meaning the farthest area or place. Isidore of Sevilla considered Hispania derived from Hispalis....

 was the name of the whole Iberian Peninsula
Iberian Peninsula
The Iberian Peninsula , sometimes called Iberia, is located in the extreme southwest of Europe and includes the modern-day sovereign states of Spain, Portugal and Andorra, as well as the British Overseas Territory of Gibraltar...

. It covered Hispania and the westernmost province of Roman Africa:
  • Baetica
  • Baleares (the Mediterranean islands)
  • Carthaginiensis
  • Tarraconensis
  • Gallaecia
    Gallaecia
    Gallaecia or Callaecia, also known as Hispania Gallaecia, was the name of a Roman province and an early Mediaeval kingdom that comprised a territory in the north-west of Hispania...

  • Lusitania
    Lusitania
    Lusitania or Hispania Lusitania was an ancient Roman province including approximately all of modern Portugal south of the Douro river and part of modern Spain . It was named after the Lusitani or Lusitanian people...

  • Mauretania Tingitana
    Mauretania Tingitana
    Mauretania Tingitana was a Roman province located in northwestern Africa, coinciding roughly with the northern part of present-day Morocco. The province extended from the northern peninsula, opposite Gibraltar, to Chellah and Volubilis to the south, and as far east as the Oued Laou river. Its...

     or Hispania Nova
    Hispania Nova
    Hispania Nova can mean:* Two Roman provinces** Hispania Nova Citerior Antoniniana , established by Caracalla from a short time after 211 over the Gallaecian conventi of Bracara, Lucus and perhaps Asturica.** Hispania Nova Ulterior Tingitana , the name set by Marcus Aurelius...

    , in North Africa
    North Africa
    North Africa or Northern Africa is the northernmost region of the African continent, linked by the Sahara to Sub-Saharan Africa. Geopolitically, the United Nations definition of Northern Africa includes eight countries or territories; Algeria, Egypt, Libya, Morocco, South Sudan, Sudan, Tunisia, and...


Diocese of Britanniae
Roman Britain
Roman Britain was the part of the island of Great Britain controlled by the Roman Empire from AD 43 until ca. AD 410.The Romans referred to the imperial province as Britannia, which eventually comprised all of the island of Great Britain south of the fluid frontier with Caledonia...

 

Britanniae was again a plural
  • Maxima Caesariensis
    Maxima Caesariensis
    Maxima Caesariensis was the name of one of the four provinces of later Roman Britain . Its capital was Londinium and probably encompassed what is now south east England. Originally, its governors were of equestrian rank but by the mid fourth century they had to be of consular rank...

  • Valentia
    Valentia (Roman Britain)
    Valentia was the name of a consular northern province of Roman Britain.-History:Count Theodosius set up Valentia in 369 AD as part of his reorganisation of Britain following the Great Conspiracy, and probably named it after the reigning emperors, Valentinian and Valens.Ammianus tells of how the...

  • Britannia Prima
    Britannia Prima
    Britannia Prima was one of the provinces of Roman Britain in existence by c. 312 AD. It was probably created as part of the administrative reforms of the Roman Emperor Diocletian after the defeat of the usurper Allectus by Constantius Chlorus in 296 AD. In the 3rd century, the Romans created...

  • Britannia Secunda
    Britannia Secunda
    Britannia Secunda was one of the provinces of Roman Britain in existence by c. 312 AD and probably created as part of the administrative reforms of the Roman Emperor Diocletian after the defeat of the usurper Allectus by Constantius Chlorus in 296 AD. The governors of Britannia Secunda were of...

  • Flavia Caesariensis
    Flavia Caesariensis
    Flavia Caesariensis was one of the provinces of Roman Britain.It was created in the early 4th century under the reforms of Diocletian and it has been suggested that its capital may have been at Lincoln...


Praetorian prefecture of Italy and Africa (western)
Praetorian prefecture of Italy
The praetorian prefecture of Italy ) was one of four large Praetorian prefectures into which the Late Roman Empire was divided. It comprised the Italian peninsula, the Western Balkans, the Danubian provinces and parts of North Africa...

 

Originally there was a single diocese of Italia
Italia (Roman province)
Italia was the name of the Italian peninsula of the Roman Empire.-Under the Republic and Augustan organization:During the Republic and the first centuries of the empire, Italia was not a province, but rather the territory of the city of Rome, thus having a special status: for example, military...

, but it was eventually split into a northern section and a southern section. The division of Italy into regions had already been established by Aurelian
Aurelian
Aurelian , was Roman Emperor from 270 to 275. During his reign, he defeated the Alamanni after a devastating war. He also defeated the Goths, Vandals, Juthungi, Sarmatians, and Carpi. Aurelian restored the Empire's eastern provinces after his conquest of the Palmyrene Empire in 273. The following...

.

Diocese of Italia suburbicaria 

Suburbicaria indicates proximity to Rome, the Urbs (capital city). It included the islands, not considered actually Italian in Antiquity (hence they were provinces while the peninsular regions still had a superior status), given their different ethnic stock (e.g. Sicily
Sicily
Sicily is a region of Italy, and is the largest island in the Mediterranean Sea. Along with the surrounding minor islands, it constitutes an autonomous region of Italy, the Regione Autonoma Siciliana Sicily has a rich and unique culture, especially with regard to the arts, music, literature,...

 was named after the Siculi) and history of piracy.
  • Campania
  • Tuscania et Umbria
  • Picenum Suburbicarium
  • Apulia et Calabria
  • Bruttia et Lucania
  • Samnium
    Samnium
    Samnium is a Latin exonym for a region of south or south and central Italy in Roman times. The name survives in Italian today, but today's territory comprising it is only a small portion of what it once was. The populations of Samnium were called Samnites by the Romans...

  • Valeria
  • Corsica
    Corsica
    Corsica is an island in the Mediterranean Sea. It is located west of Italy, southeast of the French mainland, and north of the island of Sardinia....

  • Sicilia
  • Sardinia
    Sardinia
    Sardinia is the second-largest island in the Mediterranean Sea . It is an autonomous region of Italy, and the nearest land masses are the French island of Corsica, the Italian Peninsula, Sicily, Tunisia and the Spanish Balearic Islands.The name Sardinia is from the pre-Roman noun *sard[],...


Diocese of Italia annonaria 

Annonaria refers to a reliance on the area for the provisioning of Rome. It encompassed northern Italy and Raetia.
  • Venetia and Istria
  • Aemilia
    Emilia (region of Italy)
    Emilia is a historical region of northern Italy which approximately corresponds to the western and north-eastern portions of today’s Emilia-Romagna region...

  • Liguria
    Liguria (Roman province)
    Liguria was a late Roman province in Italy in the 4th-6th centuries. Despite its name, it encompassed most of the modern Italian region of Piedmont and parts of Lombardy, but not the medieval and modern region Liguria, which was included in the province of Alpes Cottiae. The province's capital was...

  • Flaminia and Picenum Annonarium
  • Alpes Cottiae
    Alpes Cottiae
    Alpes Cottiae was a province of the Roman Empire, one of three small provinces straddling the Alps between modern France and Italy. Its name survives in the modern Cottian Alps. In antiquity, the province's most important duty was the safeguarding of communications over the Alpine passes...

  • Raetia
    Raetia
    Raetia was a province of the Roman Empire, named after the Rhaetian people. It was bounded on the west by the country of the Helvetii, on the east by Noricum, on the north by Vindelicia, on the west by Cisalpine Gaul and on south by Venetia et Histria...

     I
  • Raetia
    Raetia
    Raetia was a province of the Roman Empire, named after the Rhaetian people. It was bounded on the west by the country of the Helvetii, on the east by Noricum, on the north by Vindelicia, on the west by Cisalpine Gaul and on south by Venetia et Histria...

     II

Diocese of Africa
Diocese of Africa
The Diocese of Africa was a diocese of the later Roman Empire, incorporating the provinces of North Africa, except Mauretania Tingitana. Its seat was at Carthage, and it was subordinate to the Praetorian prefecture of Italy....

 

Africa
Diocese of Africa
The Diocese of Africa was a diocese of the later Roman Empire, incorporating the provinces of North Africa, except Mauretania Tingitana. Its seat was at Carthage, and it was subordinate to the Praetorian prefecture of Italy....

 included the central part of Roman North Africa:
  • Africa proconsularis or Zeugitana
  • Byzacena
    Byzacena
    Byzacena was a Roman province in what is now Tunisia.At the end of the third century AD, the Emperor Diocletian divided the great Roman province of Africa Proconsularis into three smaller provinces: Zeugitana in the north, still governed by a proconsul and referred to as Proconsularis, Byzacena,...

  • Mauretania Caesariensis
    Mauretania Caesariensis
    Mauretania Caesariensis was a Roman province located in northwestern Africa. It was the easternmost of the North African Roman provinces, mainly in present Algeria, with its capital at Caesarea , now Cherchell.-Historical background:In the first century AD, Roman...

  • Sitifensis
  • Numidia
    Numidia
    Numidia was an ancient Berber kingdom in part of present-day Eastern Algeria and Western Tunisia in North Africa. It is known today as the Chawi-land, the land of the Chawi people , the direct descendants of the historical Numidians or the Massyles The kingdom began as a sovereign state and later...

  • Tripolitania
    Tripolitania
    Tripolitania or Tripolitana is a historic region and former province of Libya.Tripolitania was a separate Italian colony from 1927 to 1934...


Praetorian Prefecture of Illyricum
Praetorian prefecture of Illyricum
The praetorian prefecture of Illyricum was one of four praetorian prefectures into which the Late Roman Empire was divided.The administrative centre of the prefecture was Sirmium , and, after 379, Thessalonica...

 

The Prefecture of Illyricum was named after the former province of Illyricum
Illyricum (Roman province)
The Roman province of Illyricum or Illyris Romana or Illyris Barbara or Illyria Barbara replaced most of the region of Illyria. It stretched from the Drilon river in modern north Albania to Istria in the west and to the Sava river in the north. Salona functioned as its capital...

. It originally included two dioceses, the Diocese of Pannoniae and the Diocese of Moesiae. The Diocese of Moesiae was later split into two dioceses: the Diocese of Macedonia
Diocese of Macedonia
The Diocese of Macedonia was a diocese of the later Roman Empire, forming part of the praetorian prefecture of Illyricum. Its capital was Thessalonica....

 and the Diocese of Dacia
Diocese of Dacia
The Diocese of Dacia was a diocese of the later Roman Empire, in the area of modern Serbia and western Bulgaria. It was subordinate to the Praetorian prefecture of Illyricum...

.

Diocese of Pannonia
Diocese of Pannonia
The Diocese of Pannonia , from 379 known as the Diocese of Illyricum, was a diocese of the Late Roman Empire. The seat of the vicarius was Sirmium.-History:...

 

Pannonia was one of the two dioceses in the eastern quarters of the Tetrarchy not belonging to the cultural Greek half of the empire (the other was Dacia); It was transferred to the western empire when Theodosius I fixed the final split of the two empires in 395.
  • Dalmatia
    Dalmatia
    Dalmatia is a historical region on the eastern coast of the Adriatic Sea. It stretches from the island of Rab in the northwest to the Bay of Kotor in the southeast. The hinterland, the Dalmatian Zagora, ranges from fifty kilometers in width in the north to just a few kilometers in the south....

  • Noricum mediterraneum
  • Noricum ripensis
  • Pannonia Prima
    Pannonia Prima
    Pannonia Prima was an ancient Roman province. It was formed in the year 296, during the reign of Emperor Diocletian. Previously, it was a part of the province of Pannonia, which was gradually divided into four administrative units: Pannonia Prima, Pannonia Secunda, Valeria, and Savia. This...

  • Pannonia Secunda
    Pannonia Secunda
    The Pannonia Secunda was one of the provinces of the Roman Empire. It was formed in the year 296, during the reign of emperor Diocletian. The capital of the province was Sirmium...

  • Savia
    Pannonia Savia
    The Pannonia Savia, also known as Savia and Pannonia Ripariensis, was an ancient Roman province. It was formed in the year 296, during the reign of emperor Diocletian. The capital of the province was Siscia . Pannonia Savia included parts of present-day Croatia, Slovenia, and Bosnia and...

  • Valeria ripensis

Diocese of Dacia
Diocese of Dacia
The Diocese of Dacia was a diocese of the later Roman Empire, in the area of modern Serbia and western Bulgaria. It was subordinate to the Praetorian prefecture of Illyricum...

 

The Dacians
Dacians
The Dacians were an Indo-European people, very close or part of the Thracians. Dacians were the ancient inhabitants of Dacia...

 had lived in the Transylvania
Transylvania
Transylvania is a historical region in the central part of Romania. Bounded on the east and south by the Carpathian mountain range, historical Transylvania extended in the west to the Apuseni Mountains; however, the term sometimes encompasses not only Transylvania proper, but also the historical...

 area, annexed to the Empire by Trajan
Trajan
Trajan , was Roman Emperor from 98 to 117 AD. Born into a non-patrician family in the province of Hispania Baetica, in Spain Trajan rose to prominence during the reign of emperor Domitian. Serving as a legatus legionis in Hispania Tarraconensis, in Spain, in 89 Trajan supported the emperor against...

. However, during the invasions of the third century Dacia was largely abandoned. Some inhabitants evacuated from the abandoned province settled on the south side of the Danube. They renamed their new homeland Dacia to diminish the impact that abandoning the original Dacia
Dacia
In ancient geography, especially in Roman sources, Dacia was the land inhabited by the Dacians or Getae as they were known by the Greeks—the branch of the Thracians north of the Haemus range...

 had on the Empire's prestige. The diocese was transferred to the western empire in 384 by Theodosius I, probably in partial compensation to the empress Justina for his recognition of the usurpation of Magnus Maximus in Britannia, Gaul and Hispania.
  • Dacia mediterranea
    Dacia
    In ancient geography, especially in Roman sources, Dacia was the land inhabited by the Dacians or Getae as they were known by the Greeks—the branch of the Thracians north of the Haemus range...

  • Moesia
    Moesia
    Moesia was an ancient region and later Roman province situated in the Balkans, along the south bank of the Danube River. It included territories of modern-day Southern Serbia , Northern Republic of Macedonia, Northern Bulgaria, Romanian Dobrudja, Southern Moldova, and Budjak .-History:In ancient...

     I
  • Praevalitana
    Praevalitana
    Praevalitana was an ancient Roman province. It included parts of present-day Albania, Montenegro and Serbia.-History:...

  • Dardania
  • Dacia ripensis
    Dacia
    In ancient geography, especially in Roman sources, Dacia was the land inhabited by the Dacians or Getae as they were known by the Greeks—the branch of the Thracians north of the Haemus range...


Diocese of Macedonia
Diocese of Macedonia
The Diocese of Macedonia was a diocese of the later Roman Empire, forming part of the praetorian prefecture of Illyricum. Its capital was Thessalonica....

 

The Diocese of Macedonia
Diocese of Macedonia
The Diocese of Macedonia was a diocese of the later Roman Empire, forming part of the praetorian prefecture of Illyricum. Its capital was Thessalonica....

 was transferred to the western empire in 384 by Theodosius I, probably in partial compensation to the empress Justina for his recognition of the usurpation of Magnus Maximus in Britannia, Gaul and Hispania.
  • Macedonia Prima
  • Macedonia Salutaris (or Macedonia Secunda)
  • Thessalia
    Thessaly
    Thessaly is a traditional geographical region and an administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, Thessaly was known as Aeolia, and appears thus in Homer's Odyssey....

  • Epirus vetus
  • Epirus nova
  • Achaea
    Achaea (Roman province)
    Achaea, or Achaia, was a province of the Roman Empire, consisting of the Peloponnese, eastern Central Greece and parts of Thessaly. It bordered on the north by the provinces of Epirus vetus and Macedonia...

  • Creta

Praetorian Prefecture of Oriens
Praetorian prefecture of the East
The praetorian prefecture of the East or of Oriens was one of four large praetorian prefectures into which the Late Roman Empire was divided...

 

As the rich home territory of the eastern emperor, the Oriens ("East") prefecture would persist as the core of the Byzantine Empire
Byzantine Empire
The Byzantine Empire was the Eastern Roman Empire during the periods of Late Antiquity and the Middle Ages, centred on the capital of Constantinople. Known simply as the Roman Empire or Romania to its inhabitants and neighbours, the Empire was the direct continuation of the Ancient Roman State...

 long after the fall of Rome. Its praetorian prefect would be the last to survive, but his office was transformed into an essentially internal minister.

Diocese of Thrace
Diocese of Thrace
The Diocese of Thrace was a diocese of the later Roman Empire, incorporating the provinces of the eastern Balkan Peninsula The Diocese of Thrace was a diocese of the later Roman Empire, incorporating the provinces of the eastern Balkan Peninsula The Diocese of Thrace was a diocese of the later...

 

Thrace was the eastern-most corner of the Balkans (the only part outside the Illyricum prefecture) and the European hinterland of Constantinople.
  • Europa
    Europa (Roman province)
    Europa was a Roman province within the Diocese of Thrace. Established by Roman Emperor Diocletian in 314, the province's capital was Perinthus. The province largely corresponds to what is modern day European Turkey...

  • Thracia
    Thracia
    Thracia is a Web-Based computer game created and developed by an exclusively Romanian team, part of Infotrend Consulting, and launched in 2009. At the time, it was the first endeavor of its kind. All browser games were text based, made up mostly of static content...

  • Haemimontus
  • Rhodope
    Rhodope (Roman province)
    Rhodope was a late Roman and early Byzantine province, situated on the northern Aegean coast. A part of the Diocese of Thrace, it extended along the Rhodope Mountains range, covering parts of modern Western Thrace and south-western Bulgaria. The province was headed by a governor of the rank of...

  • Moesia
    Moesia
    Moesia was an ancient region and later Roman province situated in the Balkans, along the south bank of the Danube River. It included territories of modern-day Southern Serbia , Northern Republic of Macedonia, Northern Bulgaria, Romanian Dobrudja, Southern Moldova, and Budjak .-History:In ancient...

     II
  • Scythia

Diocese of Asia
Diocese of Asia
The Diocese of Asia was a diocese of the later Roman Empire, incorporating the provinces of western Asia Minor and the islands of the eastern Aegean Sea...

na

Asia (or Asia Minor) in Antiquity stood for Anatolia. This diocese (the name means 'the Asian ones') centred on the earlier Roman province of Asia, and only covered the rich western part of the peninsula, mainly near the Aegean Sea.
  • Asia
  • Hellespontus (i.e. near the Sea of Marmara, so closest to Greece)
  • Pamphylia
    Pamphylia
    In ancient geography, Pamphylia was the region in the south of Asia Minor, between Lycia and Cilicia, extending from the Mediterranean to Mount Taurus . It was bounded on the north by Pisidia and was therefore a country of small extent, having a coast-line of only about 75 miles with a breadth of...

  • Caria
    Caria
    Caria was a region of western Anatolia extending along the coast from mid-Ionia south to Lycia and east to Phrygia. The Ionian and Dorian Greeks colonized the west of it and joined the Carian population in forming Greek-dominated states there...

  • Lydia
    Lydia
    Lydia was an Iron Age kingdom of western Asia Minor located generally east of ancient Ionia in the modern Turkish provinces of Manisa and inland İzmir. Its population spoke an Anatolian language known as Lydian....

  • Lycia
    Lycia
    Lycia Lycian: Trm̃mis; ) was a region in Anatolia in what are now the provinces of Antalya and Muğla on the southern coast of Turkey. It was a federation of ancient cities in the region and later a province of the Roman Empire...

  • Lycaonia
    Lycaonia
    In ancient geography, Lycaonia was a large region in the interior of Asia Minor, north of Mount Taurus. It was bounded on the east by Cappadocia, on the north by Galatia, on the west by Phrygia and Pisidia, while to the south it extended to the chain of Mount Taurus, where it bordered on the...

  • Pisidia
    Pisidia
    Pisidia was a region of ancient Asia Minor located north of Lycia, and bordering Caria, Lydia, Phrygia and Pamphylia. It corresponds roughly to the modern-day province of Antalya in Turkey...

  • Phrygia Pacatiana
  • Phrygia Salutaris
  • and the adjoining (now mostly Greek) Aegean islands
    Aegean Islands
    The Aegean Islands are the group of islands in the Aegean Sea, with mainland Greece to the west and north and Turkey to the east; the island of Crete delimits the sea to the south, those of Rhodes, Karpathos and Kasos to the southeast...

     in the aptly named province Insulae

Diocese of Pontus
Diocese of Pontus
The Diocese of Pontus was a diocese of the later Roman Empire, incorporating the provinces of northern and northeastern Asia Minor up to the border with the Sassanid Empire in Armenia. The diocese was established after the reforms of Diocletian, and its vicarius, headquartered at Amaseia, was...

 

Pontus is Latinized from Greek Pontos
Pontós
Pontós is a municipality in the comarca of Alt Empordà, Girona, Catalonia, Spain....

: the name of a Hellenistic kingdom derived from Pontos (Euxinos), i.e. the (Black) Sea, earlier used for a major Hellenistic kingdom.

It mainly contains parts of Asia minor near those coasts (as well as the mountainous centre), but also includes the north of very variable border with Rome's enemy Parthia/Persia.
  • Bithynia
    Bithynia
    Bithynia was an ancient region, kingdom and Roman province in the northwest of Asia Minor, adjoining the Propontis, the Thracian Bosporus and the Euxine .-Description:...

  • Galatia
    Galatia
    Ancient Galatia was an area in the highlands of central Anatolia in modern Turkey. Galatia was named for the immigrant Gauls from Thrace , who settled here and became its ruling caste in the 3rd century BC, following the Gallic invasion of the Balkans in 279 BC. It has been called the "Gallia" of...

  • Galatia Salutaris
  • Paphlagonia
    Paphlagonia
    Paphlagonia was an ancient area on the Black Sea coast of north central Anatolia, situated between Bithynia to the west and Pontus to the east, and separated from Phrygia by a prolongation to the east of the Bithynian Olympus...

  • Honorias
    Honorias
    Honorias was a late Roman province encompassing parts of Bithynia and Paphlagonia in Asia Minor . Its capital was Claudiopolis , and its governor was of the rank of praeses....

  • Cappadocia
    Cappadocia (Roman province)
    Cappadocia was a province of the Roman empire in Anatolia , with its capital at Caesarea. It was established in 17 AD by the emperor Tiberius , following the death of Cappadocia's last king, Archelaus. It was an imperial province, meaning that its governor was directly appointed by the emperor...

     I
  • Cappadocia II
  • Helenopontus
  • Pontus Polemoniacus
  • Armenia
    Roman Armenia
    From the end of the 1st century BC onwards, Armenia was, in part or whole, subject to the Roman Empire and its successor, the East Roman or Byzantine Empire...

     I
  • Armenia II

Diocese of Oriens 

The Eastern diocese shares its geographic name with the prefecture, even after it lost its rich part, Egypt, becoming a separate diocese; but militarily crucial on the Persian (Sassanid) border and unruly desert tribes.

It comprised mainly the modern Arabic Mashriq
Mashriq
Mashriq or Mashreq is derived from the Arabic consonantal root sh-r-q relating to the east or the sunrise, and essentially means "east"...

 (Syria
Syria
Syria , officially the Syrian Arab Republic , is a country in Western Asia, bordering Lebanon and the Mediterranean Sea to the West, Turkey to the north, Iraq to the east, Jordan to the south, and Israel to the southwest....

, Lebanon
Lebanon
Lebanon , officially the Republic of LebanonRepublic of Lebanon is the most common term used by Lebanese government agencies. The term Lebanese Republic, a literal translation of the official Arabic and French names that is not used in today's world. Arabic is the most common language spoken among...

, Iraq
Iraq
Iraq ; officially the Republic of Iraq is a country in Western Asia spanning most of the northwestern end of the Zagros mountain range, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....

, Israel
Israel
The State of Israel is a parliamentary republic located in the Middle East, along the eastern shore of the Mediterranean Sea...

, the Palestinian Territories
Palestinian territories
The Palestinian territories comprise the West Bank and the Gaza Strip. Since the Palestinian Declaration of Independence in 1988, the region is today recognized by three-quarters of the world's countries as the State of Palestine or simply Palestine, although this status is not recognized by the...

 and Jordan
Jordan
Jordan , officially the Hashemite Kingdom of Jordan , Al-Mamlaka al-Urduniyya al-Hashemiyya) is a kingdom on the East Bank of the River Jordan. The country borders Saudi Arabia to the east and south-east, Iraq to the north-east, Syria to the north and the West Bank and Israel to the west, sharing...

) except for the desert hinterland:
  • Arabia
    Arabia Petraea
    Arabia Petraea, also called Provincia Arabia or simply Arabia, was a frontier province of the Roman Empire beginning in the 2nd century; it consisted of the former Nabataean kingdom in modern Jordan, southern modern Syria, the Sinai Peninsula and northwestern Saudi Arabia. Its capital was Petra...

  • Palestina I
    Palestine
    Palestine is a conventional name, among others, used to describe the geographic region between the Mediterranean Sea and the Jordan River, and various adjoining lands....

  • Palestina II
    Palestine
    Palestine is a conventional name, among others, used to describe the geographic region between the Mediterranean Sea and the Jordan River, and various adjoining lands....

  • Palestina Salutaris
  • Syria I
    Syria (Roman province)
    Syria was a Roman province, annexed in 64 BC by Pompey, as a consequence of his military presence after pursuing victory in the Third Mithridatic War. It remained under Roman, and subsequently Byzantine, rule for seven centuries, until 637 when it fell to the Islamic conquests.- Principate :The...

  • Syria II
    Syria (Roman province)
    Syria was a Roman province, annexed in 64 BC by Pompey, as a consequence of his military presence after pursuing victory in the Third Mithridatic War. It remained under Roman, and subsequently Byzantine, rule for seven centuries, until 637 when it fell to the Islamic conquests.- Principate :The...

  • Phoenice
    Phoenice
    Phoenice or Phoenike was an ancient Greek city in Epirus and capital of the Chaonians. It was also the location of the Treaty of Phoenice which ended the First Macedonian War, as well as one of the wealthiest cities in Epirus until the Roman conquest. During the early Byzantine period, Phoenice...

  • Phoenice Libanensis
  • Euphratensis
  • Osroene
    Osroene
    Osroene, also spelled Osrohene and Osrhoene and sometimes known by the name of its capital city, Edessa , was a historic Syriac kingdom located in Mesopotamia, which enjoyed semi-autonomy to complete independence from the years of 132 BC to AD 244.It was a Syriac-speaking kingdom.Osroene, or...

  • Mesopotamia
    Mesopotamia (Roman province)
    Mesopotamia was the name of two distinct Roman provinces, the one a short-lived creation of the Roman Emperor Trajan in 116–117 and the other established by Emperor Septimius Severus in ca. 198, which lasted until the Muslim conquests of the 7th century....



Further it contained the southeastern coast of Asia Minor and the close island of Cyprus
Cyprus
Cyprus , officially the Republic of Cyprus , is a Eurasian island country, member of the European Union, in the Eastern Mediterranean, east of Greece, south of Turkey, west of Syria and north of Egypt. It is the third largest island in the Mediterranean Sea.The earliest known human activity on the...

  • Cilicia
    Cilicia
    In antiquity, Cilicia was the south coastal region of Asia Minor, south of the central Anatolian plateau. It existed as a political entity from Hittite times into the Byzantine empire...

     I
  • Cilicia II
  • Isauria
    Isauria
    Isauria , in ancient geography, is a rugged isolated district in the interior of South Asia Minor, of very different extent at different periods, but generally covering what is now the district of Bozkır and its surroundings in the Konya province of Turkey, or the core of the Taurus Mountains. In...

  • Corduene
    Corduene
    Corduene was an ancient region located in northern Mesopotamia and modern day Kurdish inhabited south east Turkey. It was a province of the Greater Armenia. It was referred to by the Greeks as Karduchia and by both the Greeks and Romans as Corduene...

  • Cyprus
    Cyprus
    Cyprus , officially the Republic of Cyprus , is a Eurasian island country, member of the European Union, in the Eastern Mediterranean, east of Greece, south of Turkey, west of Syria and north of Egypt. It is the third largest island in the Mediterranean Sea.The earliest known human activity on the...


Diocese of Aegyptus 

This diocese, comprising north eastern Africa—mainly Egypt, the rich granary and traditional personal domain of the emperors—was the only diocese that was not under a vicarius, but whose head retained the unique title of Praefectus Augustalis. It was created by a split of the diocese of Oriens.

All but one, the civilian governors were of the modest rank of Praeses provinciae.
  • Aegyptus came to designate Lower Egypt around Alexandria. Originally it was named Aegyptus Iovia (from Jupiter, for the Augustus Diocletian). Later it was divided into two provinces
  • Augustamnica
    Augustamnica
    Augustamnica or Avgoustamnikai was a Roman province of Egypt created during the 5th century and was part of the Diocese of Oriens first and then of the Diocese of Egypt, until the Muslim conquest of Egypt in the 640s...

     was the remainder of Lower Egypt, together with the eastern part of the Nile delta (13 'cities') – the only Egyptian province under a Corrector
    Corrector
    A corrector is a person who or object that practices correction, usually by removing or rectifying errors.The word is originally a Roman title corrector, derived from the Latin verb corrigēre, meaning "an action to rectify, to make right a wrong."Apart from the general sense of anyone who corrects...

    , a lower ranking governor. Originally it was named Aegyptus Herculia (for Diocletian's junior, the Caesar; with ancient Memphis). Later it was divided in two provinces
  • Thebais was Upper Egypt. Nubia south of Philae had been abandoned to tribal people. Later it was divided into two provinces, Superior and Inferior.
  • Arcadia
    Arcadia Ægypti
    Arcadia or Arcadia Ægypti was an ancient region in Roman-controlled Egypt. The territory was mostly carved from the former region, Heptanomis, and included the nomes of Memphites, Heracleopolites, Arsinoites, Aphroditopolites, Oxyrhyncites, which together form the northern portion of the...

     (also Arcadia Ægypti; not Arcadia
    Arcadia
    Arcadia is one of the regional units of Greece. It is part of the administrative region of Peloponnese. It is situated in the central and eastern part of the Peloponnese peninsula. It takes its name from the mythological character Arcas. In Greek mythology, it was the home of the god Pan...

     in Greece)


Apart from modern Egypt, Aegyptus also comprised the former province of Cyrenaica
Cyrenaica
Cyrenaica is the eastern coastal region of Libya.Also known as Pentapolis in antiquity, it was part of the Creta et Cyrenaica province during the Roman period, later divided in Libia Pentapolis and Libia Sicca...

, being the east of modern Libya (an ancient name for the whole African continent as well). Cyrenaica was split into two provinces, each under a praeses:
  • Libya Superior
  • Libya Inferior

External links

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