In 1192/93, Kaykhusraw returned the Byzantine nobleman,
Theodore Mangaphas, to
Emperor Isaac II after receiving assurances of Mangaphas' treatment. With his brother,
Rukn ad-Din Suleiman Shah, quickly advancing towards
Konya, Kaykhusraw fled to
Constantinople in 1196. He lived in Constantinople from 1197–1203, possibly even being baptised. A
mathnawi written by Kaykhusraw himself compares his destiny during that period to that of the legendary Iranian hero Jam (
Jamshid), who had to go into exile after losing his divine fortune (
farr). After
Suleiman's death and
Kilij Arslan's ascension to the sultanate, Kaykhusraw forced his way into Konya, removed Kilij from power and was enthroned for a second time. Kaykhusraw
seized Antalya in 1207 from its
Niceaen garrison which furnished the Seljuk sultanate with a port on the
Mediterranean. It was during this year, Kaykhusraw founded a mosque in Antalya. Kaykhusraw was killed at the
Battle of Antioch on the Meander in 1211. His son
Kayqubad I, by Manuel Maurozomes' daughter, ruled the Sultanate from 1220 to 1237, and his grandson,
Kaykhusraw II, ruled from 1237 to 1246. Kaykhusraw's body was taken to Konya, where it was buried in the ancestral tomb of his family. ==Identity==