Hagia Sophia (church building) built
700 CE.
Shown on the map at 40.633°, 22.947°.
The Hagia Sophia (Greek: Ἁγία Σοφία, Holy Wisdom) is a church located in Thessaloniki, Greece. With its current structure dating from the 7th century, it is one of the oldest churches in the city still standing today. Because of its outstanding Byzantine art and architecture, in addition to its importance in early Christianity, it is one of several monuments in Thessaloniki listed as a UNESCO World Heritage Site in 1988.
Text from the Wikipedia article Hagia Sophia, Thessaloniki, licensed CC BY-SA 4.0.