Ulucami, one of the oldest mosques in Anatolia, draws attention with its construction made of black stone and the inscription of different civilizations engraved on its walls. The Ulu Mosque, which consists of a group of buildings built in different periods, consists of two mosques, two madrasas, minarets, a complex and a rectangular courtyard. There are symmetrical reliefs on the main entrance of the mosque, which can be entered from 3 places, symbolizing the struggle of the lion and bull. There is a sundial on the other gate opening to Mesudiye madrasah. The 800-year-old sundial was made by Al- Cezeri, the inventor of cybernetics.