This is the Devlethan mosque, built in the name of Devlet Han, brother of Kiliç Arslan II. It underwent several restorations. Its architect is unknown. The façade of the mosque has characteristics of the Period of the Principalities and is divided into four naves with three column rows. The original earthen roof is replaced with a hipped roof. The walls of the building, which measures 20,75 x 24,8 m, are quite thick. It is illuminated by a double row of windows. The arches above the lower windows are blind arches. In the walls are materials from Antioch in Pisidia. The minaret of the mosque is in the northeast corner and its upper parts are restored. The mosque has three entrances, the main is in the north and opens to the garden. The peribolos has four naves (intercolumnar area). The mid-parts of two interior naves are covered with four elliptical domes. The domes are supported by the walls and columns. The mihrab and minbar are plain and simple. The mihrab is slightly deviated from and to the right of the central axis. The decoration of the mosque us formed by stylized geometrical designs. A domed fountain with six pedestals, which are connected to each other with arches added later, is in the courtyard.