Hadrian’s Gate is one of the two structures that have survived from Roman Attaleia period until today, the other is the Hıdırlık Tower which was built in the 1. century A.D. and should have taken its current name from the festival which is still celebrated as Hıdırellez today. The structure was originally built as a monumental tomb building beyond the city walls. Due to the increasing migration into the protection of the city of the urban population in the early Byzantine period, the walls of the city expanded and the Hıdırlık Tower transformed into a defense tower included in the expanded circuit of walls. The top floor of the monument is organized for the archers and catapults and the basement of the building was used as a chapel until the 19th century. Until 1950 it was used as a supply depot of Antalya Municipality, today it is open to organizations for a limited period and for cultural- artistic activities. The structure consists of 2 floors. The first floor has a near square plan 17,20 x 17,30 m., the second floor has a drum-like form 7,97 m. with the original version reached to the lower and the top floor, it has two entrances on the top floor, the entrance to the building on the north facade was closed by stone blocks in the early Byzantine period, enabling the transition to the structure into a fortification tower, but it was employed as the main entrance in the period when it was built. The monumental gate was in the ionic style located to the northeast of the structure. In Latin there are 6 "faskes" on either side of the door, the "ax fastened to the reed bundles" is carved in relief. It seems reasonable to think that these symbolize this structure as being the tomb of a governor, on the other faces it is faced with windows that brighten lower floor of the building. After a long hallway inside the building, there are large niches arranged in a cruciform inside, it is thought these were the places for the governor and senior members of the family were placed. At the same places on these walls there are the depictions of the Apostles and remains from when it is used as a chapel during the Christian period. After the closing of the northern entrance of the upper floor in the early Byzantine period, the entrance to this floor was provided with a space which was opened in the bottom of the northern inner wall. From this space you can enter into the upper side of the lower floor and from here you can reach the top of the structure.