The Hagia Sophia, constructed during the Byzantine era, had been hiding seven tunnels that were part of a network connecting ...

Istanbul (CNN) — Whether you’re a believer or not, visiting Hagia Sophia is a spiritual experience. The architectural genius of this place of worship — which was built as a church in 537CE before its ...

How much of a monument’s story still lies under its own floor? At Hagia Sophia in Istanbul, that question has taken on unusual weight. Restoration crews working around the monument’s foundations have ...

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The basillica and its storied mosaics constitute a matchless and threatened treasure. Architectural historian Dan Cruickshank calls it a "sacred mountain of a building, vast and elemental." Yann ...

The same report describes multiple underground “spaces” and linked tunnels in the western garden and northern (Vezir) garden areas. This isn’t the first time Hagia Sophia’s subterranean story has ...