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Hagia Sophia

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Hagia Sophia: Through the ages

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360° Explore Hagia Sophia, Istanbul's incredible Roman church - BBC

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Turkey’s Hagia Sophia turned back into a mosque, causing a divide

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Turkey reconverts Istanbul's Hagia Sophia museum into a mosque

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'Deeply saddened': Pope Francis on Hagia Sophia reverting to mosque

Hagia Sophia is the former Greek Orthodox Christian patriarchal cathedral, later an Ottoman imperial mosque and now a museum in Istanbul, Turkey. Built in 537 AD at the beginning of the Middle Ages, it was famous in particular for its massive dome. It was the world's largest building and an engineering marvel of its time. It is considered the epitome of Byzantine architecture and is said to have "changed the history of architecture".
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