It has three arches which were typical of triumphal arches. The center arch was used for traffic while the other two were blocked off by steps leading to the top of the arch. It is made with travertine whilst and marble. It had a hollow attic and a walkway at the top of the arch. The writing on the attic is a dedication to Septimus Servus.
Today it is badly worn but still has many details that are easily identified. The arch was never restored because the church protected it until the 18th century. It was excavated intact, but the workers did not pay attention to the natural bedding of the marble, causing some problems during the excavation.