Masud I or Ma'sud I was the sultan of the Seljuqs of Rûm

Sultanate of Rûm

The Sultanate of Rum , also known as the Anatolian Seljuk State , was a Turkic state centered in in Anatolia, with capitals first at İznik and then at Konya. Since the court of the sultanate was highly mobile, cities like Kayseri and Sivas also functioned at times as capitals...

 from 1116 until his death in 1156. Following the defeat and death of his father Kilij Arslan I

Kilij Arslan I

Kilij Arslan was the Seljuq Sultan of Rûm from 1092 until his death in 1107. He ruled the Sultanate during the time of the First Crusade and thus faced the brunt of the entire attack...

 by Fakhr al-Mulk Radwan of Aleppo

Aleppo

Aleppo is the largest city in Syria and the capital of Aleppo Governorate, the most populous Syrian governorate. With an official population of 2,301,570 , expanding to over 2.5 million in the metropolitan area, it is also one of the largest cities in the Levant...

 at the battle of Khabur river in 1107, Masud lost the throne in favor of Melikshah

Melikshah

Malik Shah or Malek Shah or Melik Shah was the sultan of the Seljuk Sultanate of Rûm between the years 1110 and 1116. Prior to Melikshah's accession, the throne had remained vacant for three years following the death of Kilij Arslan I in 1107. Melikshah was held prisoner in Isfahan until 1110 when...

. With the help of the Danishmends

Danishmends

The Danishmend dynasty was a Turcoman dynasty that ruled in north-central and eastern Anatolia in the 11th and 12th centuries. The centered originally around Sivas, Tokat, and Niksar in central-northeastern Anatolia, they extended as far west as Ankara and Kastamonu for a time, and as far south as...

, Masud captured Konya

Konya

Konya is a city in the Central Anatolia Region of Turkey. The metropolitan area in the entire Konya Province had a population of 1,036,027 as of 2010, making the city seventh most populous in Turkey.-Etymology:...

 and defeated Malikshah in 1116. Masud would later turn on the Danishmends and conquer their lands. In 1130, he started construction of the Alaeddin mosque

Alaeddin Mosque

Alâeddin Mosque is the principal monument on the citadel of Konya, Turkey. The building served as the “Mosque of the Throne” for the Seljuq Sultans of Rum and contains the dynastic mausoleum. It was constructed in stages between the mid-12th and mid-13th centuries...

 in Konya, which was later completed in 1221.

Masud, towards the end of his reign, fought against the armies of the Second Crusade

Second Crusade

The Second Crusade was the second major crusade launched from Europe. The Second Crusade was started in response to the fall of the County of Edessa the previous year to the forces of Zengi. The county had been founded during the First Crusade by Baldwin of Boulogne in 1098...

. There were actually two armies, one led German

Germans

The Germans are a Germanic ethnic group native to Central Europe. The English term Germans has referred to the German-speaking population of the Holy Roman Empire since the Late Middle Ages....

 empreror Conrad III

Conrad III of Germany

Conrad III was the first King of Germany of the Hohenstaufen dynasty. He was the son of Frederick I, Duke of Swabia, and Agnes, a daughter of the Salian Emperor Henry IV.-Life and reign:...

 and the other led by the French

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 king Louis VII

Louis VII of France

Louis VII was King of France, the son and successor of Louis VI . He ruled from 1137 until his death. He was a member of the House of Capet. His reign was dominated by feudal struggles , and saw the beginning of the long rivalry between France and England...

. Masud defeated both of them; the first army in Dorylaeum

Dorylaeum

Dorylaeum or Dorylaion was an ancient city in Anatolia. It is now in ruins near the city of Eskişehir, Turkey.The city existed under the Phrygians but may have been much older. It was a Roman trading post. It also was probably a key city of the route the Apostle Paul took on his Second Missonary...

 near modern Eskişehir

Eskisehir

Eskişehir is a city in northwestern Turkey and the capital of the Eskişehir Province. According to the 2009 census, the population of the city is 631,905. The city is located on the banks of the Porsuk River, 792 m above sea level, where it overlooks the fertile Phrygian Valley. In the nearby...

 in 1147 and the second army in Laodicea

Laodicea on the Lycus

Laodicea on the Lycus was the ancient metropolis of Phrygia Pacatiana , built on the river Lycus , in Anatolia near the modern village of Eskihisar , Denizli Province,...

 near modern Denizli

Denizli

Denizli is a growing industrial city in the Southwestern part of Turkey and the eastern end of the alluvial valley formed by the river Büyük Menderes, where the plain reaches an elevation of about a hundred meters. Denizli is located in southwestern Turkey, in the country's Aegean Region.The city...

 in 1148.

When he died, Masud was succeeded by his son Kilij Arslan II

Kilij Arslan II

Kilij Arslan II was a Seljuk Sultan of Rûm from 1156 until his death in 1192.As Arnold of Lübeck reports in his Chronica Slavorum, he was present at the meeting of Henry the Lion with Kilij-Arslan during the former's pilgrimage to Jerusalem in 1172...

.

One of Masud's daughters married John Tzelepes Komnenos

John Tzelepes Komnenos

John Tzelepes Komnenos was the son of Isaac Komnenos.Starting about 1130 John and his father, who was a brother of Emperor John II Komnenos , plotted to overthrow his uncle the emperor. They made various plans and alliances with the Danishmend leader and other Turks who held parts of Asia Minor...

, a member of the royal house of Byzantium

Byzantium

Byzantium was an ancient Greek city, founded by Greek colonists from Megara in 667 BC and named after their king Byzas . The name Byzantium is a Latinization of the original name Byzantion...

who had converted to Islam.