Thomas I Komnenos Doukas
Encyclopedia
Thomas I Komnenos Doukas (or Comnenus Ducas) (c. 1285–1318) ruler of Epirus
Despotate of Epirus
The Despotate or Principality of Epirus was one of the Byzantine Greek successor states of the Byzantine Empire that emerged in the aftermath of the Fourth Crusade in 1204. It claimed to be the legitimate successor of the Byzantine Empire, along with the Empire of Nicaea, and the Empire of Trebizond...

 from c. 1297 until his death in 1318.

Thomas was the son of Nikephoros I Komnenos Doukas
Nikephoros I Komnenos Doukas
Nikephoros I Komnenos Doukas, Latinized as Nicephorus I Comnenus Ducas , was ruler of Epirus from 1267/8 to c. 1297.-Life:Nikephoros was the eldest son of Michael II Komnenos Doukas and Theodora Petraliphaina...

 and Anna Kantakouzene, a niece of Emperor Michael VIII Palaiologos
Michael VIII Palaiologos
Michael VIII Palaiologos or Palaeologus reigned as Byzantine Emperor 1259–1282. Michael VIII was the founder of the Palaiologan dynasty that would rule the Byzantine Empire until the Fall of Constantinople in 1453...

. In 1290 he was conferred the court dignity of despotes
Despotes
Despot , was a senior Byzantine court title that was bestowed on the sons or sons-in-law of reigning emperors, and initially denoted the heir-apparent...

 by his mother's cousin, Emperor Andronikos II Palaiologos
Andronikos II Palaiologos
Andronikos II Palaiologos , Latinized as Andronicus II Palaeologus, was Byzantine emperor from 1282 to 1328. He was the eldest surviving son of Michael VIII Palaiologos and Theodora Doukaina Vatatzina, grandniece of John III Doukas Vatatzes...

. Thomas' succession to his father's principality was endangered by the marriage of his sister Thamar Angelina Komnene to Philip I of Taranto
Philip I of Taranto
Philip I of Taranto : of the Angevin house, was titular Emperor of Constantinople , despot of Epirus, King of Albania, Prince of Achaea and Taranto, and Lord of Durazzo....

, a son of King Charles II of Naples
Charles II of Naples
Charles II, known as "the Lame" was King of Naples, King of Albania, Prince of Salerno, Prince of Achaea and Count of Anjou.-Biography:...

 and Maria of Hungary
Maria Arpad of Hungary
Mary of Hungary , of the Árpád dynasty, was Queen consort of the Kingdom of Naples. She was a daughter of Stephen V of Hungary and his wife Elizabeth the Cuman.-Family:Mary's mother followed the Shamanist religion, like other Cumans...

 in 1294. Although Philip had been promised to inherit Epirus in his wife's right, when Nikephoros died between September 1296 and July 1298, Anna secured the succession of her son Thomas and assumed the regency.

This isolated Epirus from its strongest ally and left it practically without outside support. Charles II of Naples demanded that Epirus be turned over to Philip and Thamar, but Anna refused, claiming that the arrangement had been broken when Thamar had been forced to abandon her Orthodox faith. To remedy this, Anna arranged for an alliance with 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...

 and the marriage of young Thomas to Anna Palaiologina, the daughter of the co-Emperor Michael IX Palaiologos
Michael IX Palaiologos
Michael IX Palaiologos or Palaeologus , , reigned as Byzantine co-emperor with full imperial style 1294/1295–1320...

. The actual marriage took place in 1307 or 1313. In the meantime Charles II sent troops into Epirus, but they were repulsed and the Epirotes advanced into the Angevin lands in the western Balkans
Balkans
The Balkans is a geopolitical and cultural region of southeastern Europe...

, recovering Butrinto and Naupaktos in 1304–1305. A new Angevin invasion in 1307 ended with a compromise by which Philip of Taranto was ceded many of the fortresses that had been retaken by the Epirotes in the previous war.

Epirus gravited increasingly into the Byzantine orbit until a private dispute between Epirote and Byzantine commanders sparked off a new conflict in 1315. The Byzantines raided as far as Arta
Arta, Greece
Arta is a city with a rich history in northwestern Greece, capital of the peripheral unit of Arta, which is part of Epirus region. The city was known in ancient times as Ambracia . Arta is famous for its old bridge located over the Arachthos River, situated west of downtown...

, and Thomas imprisoned his wife and entered into negotiations with Philip of Taranto. But before Epirus could enter into a new alliance with the Angevins he was murdered by his nephew, Count Nicholas Orsini
Nicholas Orsini
Nicholas Orsini was count palatine of Cephalonia from 1317 to 1323 and ruler of Epirus from 1318 to 1323....

 of Cephalonia.
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