Turkish President Recep Tayyip Erdogan faces a growing backlash over plans to convert Istanbul’s Hagia Sophia, the former Greek Orthodox cathedral that is now a museum, into a mosque. Once eastern Christianity’s greatest church, it was turned into a mosque after the Ottoman conquest in the 15th century and then a museum in the 1930s. Dorian Jones reports from Istanbul on the latest battle over Hagia Sophia.Camera: Berke Bas   Produced by: Jon Spier 
 
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