Gate of Hadrian (Three Doors)
It is the only surviving structure of Attaleia, a three lanes triumphal arch decorated with carves and reliefs built in memory of Hadrian who visited the city in 130 A.D. Bridges are covered with arches, and these arches sit on four legs. Protrusions on each foot are carried by columns. In this way, there are four columns each in front and behind. Left one from two towers rising in both sides of the gate is a Roman structure, and the upper part of the other tower was built by Seljuk Sultan Alaaddin Keykubad.