The Hagia Sophia (Holy Wisdom) in Thessaloniki, Greece, is one of the oldest churches in that city still standing today.
Since the 3rd century, there was a church in the location of the current Hagia Sophia. In the 8th century, the present structure was erected, based on the Hagia Sophia inConstantinople (present-day Istanbul, Turkey). In 1205, when the Fourth Crusade captured...