Kayqubad I

Kayqubad came to the throne in 1220, and in 1221 took the castle of Kalonoros on the Mediterranean coast and gave it his own name: Alaiye, today's Alanya. He sent a naval expedition to Sudak in the Crimea and annexed Erzincan and Erzurum in the east.

In 1230 he defeated the Khwarazmshah Jalal al-Din at Yassıçemen. In his reign great caravanserais such as Sultanhanı were built along the roads of Anatolia, and the Kubadabad palace rose on the shore of Lake Beyşehir. Rumi's family also settled in Konya in this period. Kayqubad died in Kayseri in 1237.