Discover the City Walls and Gates of Istanbul. Visit the Prison of Anemas, Eğri Kapı (Crooked Gate) and the Walls of Manuel Komnenos. Then the Tekfur Palace, Theodosian Walls, Edirne Gate and Mihrimah Mosque of Great Architect Sinan. Explore Topkapı, the Mosque of Takkeci İbrahim Ağa, Mevlevihane Gate and Silivri Gate. Also the Mosque of İbrahim Paşa, Balıklı Kilise (The Church of St. Mary of the Spring), Belgrade Gate, Yedikule Gate and Yedikule Fortress. Dig out the Golden Gate, Marble Tower and the Sea Walls.