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Amazing images from largest underground structures of Hagia Sophia

Described as the "8th wonder of the world" by many people, Hagia Sophia's galleries, tunnels, cellars, and underground tomb structures bear witness to its majestic history.

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Amazing images from largest underground structures of Hagia Sophia
An Anadolu Agency team got access to the largest underground structures of Istanbul's iconic Hagia Sophia Grand Mosque.