The imposing kamára (arch) is one of a number of monuments built by Galerius around AD 305, during his reign as co-emperor of Diocletian's divided Roman Empire. It commemorated the Roman victory over Persia in AD 297, and you can still see scenes of those battles on the badly eroded bas-reliefs. Originally, the arch had four pediments and a dome and was intended to span not only the Via Egnatia, the ancient Roman road, but also a passageway leading north to the Rotunda. Only the large arches remain.
Sintrivaniou Sq., Egnatia, Thessaloniki, 54009, Greece