Şimşirli Baba Mosque and Tomb

It is located in the Kalecik Village of the Ulus district. Date of construction is unknown. It is rumored that it was built by Şimşirli Baba overnight. Next to the mosque, there is the tomb of Şimşirli Baba, the tomb of Hamza Efendi, the father of Aksemseddin, and the Aksemseddin Fountain.