Domitian Gate; is on the north of Hierapolis and has two round towers. This gate is the best preserved one. It is also known as Frontinus Gate because it was built by Julius Frontinus (84-86 AD ), proconsul of Asia Minor. Then it was dedicated to the Emperor Domitian by Frontinus. It has three openings so is also known as the three gates. One of the towers of the gate is still in good condition today.

The gate at the south end of the main street is the oldest one and was built in 65-86 AD. The lower parts of it are still under ground waiting for excavation. Also there are gates in the middle of the street which were built in the 4th century AD as a monuments of Christianity period and are shaped like triumphal arches.