In this region of Anatolia, conquered by the Turks at the beginning of the 11th century, Emir Ahmet Shah founded a mosque in 1228-1229 containing a single prayer room and crowned by two cupolas, with a hospital adjoining it. A highly elaborate technique of vault construction, and a creative, imaginative type of decorative sculpture - particularly on the three doors, in contrast to the unadorned walls of the interior - are the unique features of this masterpiece of Islamic architecture.