5Hagia Sophia, Turkey

Hagia Sophia in Istanbul is a stunning example of Byzantine architecture. Originally built as a cathedral in 537 AD by Emperor Justinian I, it was later converted into a mosque and now serves as a museum.

The massive dome, considered an engineering marvel, seems to float above the vast interior space. The building’s intricate mosaics and historical significance make it a must-visit for history and architecture enthusiasts.

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