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| Originally built as a church, Hagia Sophia was later converted into a mosque. It was the world's largest church until St. Peter's Basilica was built in Rome 1,000 years later. Nowadays it is considered a museum. |
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| Originally built as a church, Hagia Sophia was later converted into a mosque. It was the world's largest church until St. Peter's Basilica was built in Rome 1,000 years later. Nowadays it is considered a museum. |