This is the Burmalı Minare Camii (Spiral Minaret Mosque), built between 1237-1247 by the Selcuks.
On the picture: The ‘mihrab’ (prayer niche) and the ‘minber’ (pulpit).
Mihrab = a semicircular niche in the wall of a mosque that indicates the direction of the Kaaba in Mecca and hence the direction that Muslims should face when praying. The wall in which a mihrab appears is the "qibla wall."
Minber = a pulpit in the mosque where the imam (prayer leader) stands to deliver sermons.
Correspondent: J.M.Criel, Antwerpen.
Source: Wikipedia .