The Arch of Galerius, popularly called Kamara (Καμάρα) by Greeks, stands in what the centre of Thessaloniki. It is located on what is now Dimitrios Gounari Street. The arch was built in 305, to celebrate the triumph of Galerius over the Sassanids. The structure originally consisted of four main pillars and two smaller ones on each side, the former supporting a central dome.
Today only three pillars and a part of the brick masonry above survive. The other parts of the structure were destroyed at an unknown date, probably during one of many earthquakes which have damaged Thessaloniki throughout its history. The two main pillars are covered with sculpted marble slabs, which depict the wars of Galerius against the Persians. The central arched opening is 9.7 m wide and 12.5 m high and the secondary opening is 4.8 m wide and 6.5 m high.