St. Sophia Mosque (Aya Sofia) (Hagia Sophia), UNESCO World Heritage Site, Istanbul, Marmara province, Turkey, Europe

Caligraphy Roundels Naming Hasan, grandson of Mohammed on left and Caliph Alion on right, with tourists viewing from the Gallery, Interior, Hagia Sophia Grand Mosque, 537 AD, UNESCO World Heritage Site, Sultanahmet, Istanbul, Turkey, Europe

Hagia Sophia Grand Mosque, 537 AD, Sultanahmet Square, UNESCO World Heritage Site, Sultanahmet, Istanbul, Turkey, Europe

Interior view of Hagia Sophia Mosque dome, UNESCO World Heritage Site, Istanbul, Turkey, Europe

Tourists at Hagia Sophia (Aya Sofya), UNESCO World Heritage Site, mosque museum in Istanbul, Turkey, Europe

Hagia Ayasofya Sophia Grand Mosque in Istanbul, one of the main tourist city attractions and travel destinations in Turkey

The Hagia Sophia church, UNESCO World Heritage Site, Thessaloniki, Chalkidiki, Macedonia, Greece, Europe

Hagia Sophia (Ayasofya) Under Snow. The Mosque, Now A Museum Is Considered The Epitome Of Byzantine Architecture, Istanbul, Turkey

Tourists at Hagia Sophia, Istanbul, Turkey