The Fethiye Mosque is located on the northern side of the ancient Roman Agora in Athens, near the Tower of the Winds, and was built on the ruins of a Christian basilica from the middle Byzantine period (8th/9th centuries).[1][2] The Christian church was converted into a mosque in 1456/58, soon after the Ottoman conquest of the Duchy of Athens, to coincide with the visit to the city by Sultan Mehmed the Conqueror in 1458.[2][3]