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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
"The tomb structure, located just in front of the northeast facade of Hagia Sophia, is four meters below ground. This structure, known as 'Hippoje', is not an underground infrastructure built during the construction of Hagia Sophia, it is an underground structure dating back to the fourth century. This structure is the oldest architectural work that could be found in the vicinity of Hagia Sophia," he added.