Authorities in Turkey have sealed off a luxury spa set up by illegally modifying a 1,500-year-old cistern near Hagia Sophia ...

Commissioned by Emperor Justinian I, the Hagia Sophia was a marvel of engineering, featuring a vast dome that seemed to float above the central nave. It set a precedent for Byzantine architecture.

Into this chaos comes the emperor ... Justinian’s Basilica di San Vitale. The building’s octagonal shape – very much an ...