|The Seljuks of Anatolia: Court and Society in the Medieval Middle East||He was given poison during a feast at and died at an early age on 31 May 1237, the last of his line to die in independence|
|Many Muslim sufis and poets such as , , , , , and came to Anatolia during his reign||Kayqubad, like the other Seljuq sultans of Rum, was quite well versed in the fine arts and would recite quatrains in Persian during wine drinking parties|
Historian mourned his death with these words, "With Kayqubad's death, the back of Islam was broken and the bond of kingdom and religion snapped".6
|Ankara: Published in 25th Volume of||Preceded by 1220—1237 Succeeded by|
|Mindful of the increasing presence and power of the on the borders of the Sultanate of Rum, he strengthened the defenses and fortresses in his eastern provinces||Apart from reconstructing towns and fortresses, he built many , , , bridges and hospitals, many of which are preserved to this day|
Kayqubad was forced to flee to the fortress at , where he sought aid from the Turkman tribes of.