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Turkey's president formally makes Hagia Sophia a mosque

On July 10, the president of Turkey formally converted Istanbul's sixth-century Hagia Sophia back into a mosque and declared it open for Muslim worship, hours after a high court annulled a 1934 decision that had made the religious landmark a museum.

The decision sparked deep dismay among Orthodox Christians. Originally a cathedral, Hagia Sophia was turned into a mosque after Istanbul's conquest by the Ottoman Empire but had been a museum for the last 86 years, drawing millions of tourists annually.