Hagia Sophia, now known as the Ayasofya Museum, is a former Eastern Orthodox church converted to a mosque in 1453 by the Turks, and converted into a museum in 1935. It is located in Istanbul, Turkey. It is traditionally considered one of the great buildings in history. Its conquest by the Ottomans at the fall of Constantinople is considered one of the great tragedies of Christianity by the Greek Orthodox faithful.
