The Seljuk Period brought the history of Alanya to its zenith. In 1221, the Seljuk Sultan Alaaddin Keykubat made Alanya his winter residence and rebuilt the city, and Alanya became the main base of the Seljuk navy.
In this period defensive walls were also renovated and Kızılkule (Red Tower) and Tersane (Dockyard) were constructed.