This region of Anatolia was conquered by the Turks at the beginning of the 11th century. In 1228–29 Emir Ahmet Shah founded a mosque, with its adjoining hospital, at Divrigi. The mosque has a single prayer room and is crowned by two cupolas. The highly sophisticated technique of vault construction, and a creative, exuberant type of decorative sculpture – particularly on the three doorways, in contrast to the unadorned walls of the interior – are the unique features of this masterpiece of Islamic architecture.

: World Heritage Convention
http://whc.unesco.org/en/list/358