
The Rotunda, built in 306 AD by Caesar Galerius, is one of Thessaloniki’s oldest religious sites and a UNESCO World Heritage Site.
Source: Rotunda in Thessaloniki: The Oldest Surviving Church in Greece

The Rotunda, built in 306 AD by Caesar Galerius, is one of Thessaloniki’s oldest religious sites and a UNESCO World Heritage Site.
Source: Rotunda in Thessaloniki: The Oldest Surviving Church in Greece
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