Restoration workers have uncovered a well-preserved, long-hidden mosaic face of an angel at the former Byzantine cathedral of Haghia Sophia in Istanbul, an official said Friday.
The seraphim figure — one of two located on the side of a dome — had been covered up along with the building's other Christian mosaics shortly after Constantinople — the former name for Istanbul — fell to the Ottomans in 1453 and the cathedral was turned into a mosque...