The main entrance to the city is on the west. It is marked by the presence of a monumental gate which was discovered during excavations in 1924 by the University of Michigan. It consisted in a triple gate which included two side pylons and two central pylons. The pillars that carried the vault measured 3.03 m by 2.95 m and were decorated with moldings. The space between each pillar, allowing the passage of men and chariots, measured 4 m and there were pilasters with floral patterns on both sides. The facade included two reliefs depicted on the pilasters that supported the arch. These reliefs show two Parthians face on, carrying a sign. On the pilasters, there are figures wearing garlands.

On the architrave of the inner facade was inscribed in bronze letters the names of Emperor Hadrian and Empress Sabina. It dates from 129 A.D., that is to say the time when the emperor visits Asia Minor.

A second inscription, still in bronze letters, was engraved on the external facade. It bore the name of Gaius Julius Asper, consul in 212 A.D..

The architrave was decorated with two friezes: the first is made up of seahorses, tritons, Amazon shells (both ends are in the shape of an eagle's head), armor and various weapons. The second frieze displays floral patterns. The monumental Roman gates were built as trophies of victory and symbolize the military power of Roman authority, as confirmed by the decorations.