Aug 14, 2009 From church to mosque: Istanbul’s forgotten Byzantine heritage Is it a church? Is it a mosque? Is it a museum? Aya Sofya (Hagia Sophia, the Church of Divine Wisdom) may be one of İstanbul's most famous buildings, but it's also one that suffers from an acute identity crisis, having started life as the great sixth century church of the Emperor Justinian, before becoming a mosque after the Ottoman conquest of Constantinople in 1453 and then a museum in 1935 after Mustafa Kemal Atatürk declared the Turkish Republic. Something similar happened to Chora, near Edirnekapı, which also kicked...