Hagia Sophia, Thessaloniki
Thessaloniki Municipality, Greece · built 700
The Hagia Sophia (Ἁ, 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.
Church data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).