Thessaloniki has two very famous landmarks: the white tower and the the arch of galerius. The history behind this arch is actually very fascinating, it was built in 305 C.E. to signify Galerius’ win from the Persian empire. The arch is now a very popular tourist site, and there is an open space around it where people walk around and enjoy the view of the water. You will definitely stumble upon it on your next trip to Thessaloniki.