One of the most interesting monuments depicting the history of Ankara, is a Fortress or Citadel Hisar. The imposing structure of the fortress is located on a hilltop and visible from almost any point in the city. She is surrounded by a double ring of fortified walls. Most likely, this fortress could serve as a refuge in the times of the Hittites. The outer ring of walls, which today surrounds the fortress was built in the ninth century during the reign of Michael II. Internal walls belong to the sixth century.

Internal four-storey fortress, partially made of Ankara stone and also with the use of Spolana. The stones for the walls were taken from the ruins of ancient buildings of antiquity. The height of the towers in the inner fortress, varies between fourteen and sixteen meters. The fortress has survived to this day many of the Ottoman Ankara houses times of the seventeenth century.

The citadel had a heavy and important task – to reflect and defend attacks on the border, and therefore, as a kind of "border", always had to be in a state of military readiness to repel the enemy.

To enter the territory of the fortress through the gate, beneath the tower, decorated with a clock with a large dial. The thickness around the inner perimeter of the fortress walls are about eight feet in height the walls themselves in twelve meters. The highest point here is White Castle, well preserved to our times. Located here is also a small mosque, built in the twelfth century. In the fortress you can climb the tower, located in the Eastern side and enjoy the opening from here wonderful views of the city.

Around the Citadel on the ledges of the hill streets of the old city. It still all looks like a couple of hundred years ago. Some residents have built houses close to the castle walls.

At the moment most of the old buildings located on the territory of the fortress, converted for modern needs – for example, some of them are souvenir shops and cozy restaurants. Here for sale, a traditional Turkish goods, carpets and antique goods. Most of the buildings are protected by UNESCO.