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Isaac Komnenos or Comnenus (Greek: Ἰσαάκιος Κομνηνός, Isaakios KomnÄ“nos; 16 January 1093 †“ after 1152) was the third son of Byzantine Emperor Alexios I Komnenos (r. 1081–1118) and Empress Irene Doukaina.
He was the brother of Emperor John II Komnenos and the historian Anna Komnene. Isaac was given the dignity of Caesar by his father.[1]
During and after the succession of John II in 1118, Isaac supported his elder brother against the intrigues of Empress-dowager Irene and their sister Anna. John II raised Isaac to the elevated dignity of sebastokratÅr, which marked him as a near-equal to the emperor.[2] In contrast to his brother, who was chiefly engaged in warfare throughout his reign, Isaac was also a scholar and patron of learning.[3] He is known to have composed and compiled poetry, and is sometimes identified with the writer called "Isaac Komnenos the porphyrogennetos" who composed three philosophical treatises based on Proclus and two commentary works on Homer.[4]
By ca. 1130 (and possibly as early as 1122) however, John and Isaac had become estranged, and Isaac was forced to flee Constantinople with his sons for 6 years after an alleged conspiracy. Isaac found refuge at the court of the Danishmendid amirGümüshtigin Ghazi II ibn Danishmend at Melitene; at the same time, he also undertook a pilgrimage to the Holy Land.[2][5] From his exile, Isaac sought to create a broad alliance with other rulers against his brother, including the Seljuk Turksof Iconium, the independent prince Constantine Gabras of Trebizond, theArmenian Kingdom of Cilicia and the Latin Kingdom of Jerusalem. The coalition failed to materialize however, and he was forced to seek reconciliation with his brother in 1136.[2][5] Soon after, in 1139, Isaac's eldest son John again defected to the Turks. Either at that point or a little later, Isaac was banished as a precaution to Heraclea Pontica.[2]
Shortly before John II died in 1143, he had designated his fourth and youngest son Manuel as his heir over his third (and oldest surviving) son, the sebastokrator Isaac. Consequently, Manuel's succession was not immediately secure.[6][7] In thisstruggle for the throne, the elder Isaac threw his support behind the younger Isaac, but in the event, Manuel managed to seize the throne. Having failed there, in 1145–1146,, according to John Kinnamos, he attempted to take advantage of Manuel's difficulties to usurp the imperial throne from him.[2][5]
After 1050, Manuel forced his uncle to retire from public affairs, and in 1151/1152, Isaac founded the cenobitic monastery of Kosmosoteira ("World-Saviour") at Pherae. The monastery was built as his residence and final resting place; Isaac wrotethe monastery's typikon himself, leaving extensive estates, including entire villages and castles to it in Thrace.[8][9] Isaac isalso depicted in the Chora Church in Constantinople, which he extensively rebuilt. The Chora Church was also the initial location of Isaac's tomb, before he had it transferred to the Kosmosoteira monastery.
Isaac Komnenos was married to Eirene, possibly a Kievan princess. It has also been theorized that she is identical to Kata of Georgia, daughter of David IV of Georgia and Rusudan of Armenia.[citation needed] His children were:[11]
1. John Komnenos called Tzelepes (i.e., Çelebi), who became a Muslim.
2. unnamed daughter
3. Anna Komnene, who married John Arbantenos.
4. Andronikos I Komnenos, emperor 1183–1185.
Thomas Wolfgang
Ackermann
