Church of Panagia Chalkeon - Credit: Wikimedia Commons
The Church of Panagia Chalkeon () is an 11th-century Byzantine church in the northern Greek city of Thessaloniki. The church's well-preserved Byzantine architecture and testimony to the importance of Thessaloniki in early and medieval Christianity led it to be inscribed on the UNESCO World Heritage List in 1988 along with other Paleochristian and Byzantine monuments of Thessaloniki. Read more on Wikipedia
Source: en.wikipedia.org