The kale/hisar (castle/fortress) has a base of volcanic rock mass, with a 226 meters high summit was first built by Hitite King Mursilis II, c 1350 BC and named as Hapanuva used as a fortification. Since then it has been restored and used as a defensive structure. At the peak of the castle there are cultural signs from Phrygian civilisation such as shrines in the name of Kybele the mother goddess, cisterns to supply water. The castle was restored during the reign of the Seldjuk ruler Alaaddin in late 13th century, with addition of a mescid (small mosque) and a palace. The castle was restored by the order of Selim II, in 1573. Recently castle walls and stairs to the castle have been restored. There are 550 steps to the castle itself and you don’t have to go far as the castle is at the center of the city.