The gate is located in the northern part of the city, through it you can get to the historical part of Side. The main street of the ancient colony begins from the arch. The structure was erected in the 1st century in honor of the Roman Emperor Vespasian. It was a grandiose structure, reaching 6 meters in length. Over time, the gate has deteriorated greatly, but even now, based on what remains of it, one can appreciate the monumentality of Roman architecture.