Church of Panagia Chalkeon
The church of Panagia Chalkeon, often called "red church", is a Byzantine church built in the 11th century on an old pagan house of worship. Two events affected the church in the twentieth century: a fire in 1917 and an earthquake in 1932, which caused considerable damage and led to the restoration of the Panagia Chalkeon. It is now a UNESCO World Heritage Site as a Byzantine monument in Thessaloniki.