Your tour begins at the meeting point in front of Hagios Demetrios, where you'll meet your guide and start your exploration of Thessaloniki's historical treasures. Visit the White Tower, a monument and museum that replaced an old Byzantine fortification and became a notorious prison during Ottoman rule. Admire its architecture and learn about its fascinating history. Continue your journey with a visit to the Church of Saint Demetrius, the main sanctuary dedicated to the city's patron saint. Explore the Rotunda, one of the oldest religious sites in Thessaloniki, built in 306 A.D. by the Romans. Marvel at the Arch of Galerius, part of a palatial complex that may have been used as a mausoleum or temple. Finally, explore the Roman Forum of Thessaloniki, featuring two-storey stoas and dug up in the 1960s.