The Ottomans turned our Cathedral into a mosque, as they always do whenever they conquer lands, and we converted it to a museum to preserve it. Now they want to convert it back to a mosque. We say, convert it back to the Cathedral.
From 537, the year it was constructed, until 1453, when the Ottoman Empire conquered the city, Hagia Sophia served as an Eastern Orthodox cathedral and the seat of the Patriarchate of Constantinopole. It was turned into a mosque by the Ottomans before being secularized and converted to a museum in 1935.
Source: Jihad Watch