492154 Virgin and Child in Hagia Sophia (mosaic) by Byzantine School, (9th century); Hagia Sophia, Istanbul, Turkey; (add.info.: This mosaic is in the apse at the East end of the church and originally included the Archangels Michael and Gabriel. Hagia Sophia was built in 537 as a Greek Orthodox Cathedral and converted to a mosque when the Ottoman Turks conquered Constantinople in 1453. Since 1935 it has been a museum (Unesco World Heritage List, 1985).); 穢 Samuel Magal, Sites & Photos Ltd.; out of copyright.