The Rotunda is one of the oldest monuments in Thessaloniki, built around 306 AD during the Roman period as part of the palace complex of Emperor Galerius. Over the centuries it served as a Roman monument, a Christian church, and later a mosque, reflecting the city’s multicultural history.
Today, the Rotunda is part of the UNESCO-listed Paleochristian and Byzantine monuments of Thessaloniki and is famous for its impressive dome and early Christian mosaics.