The fortress is built of stone and clay. The length of the fortress from west to the east is 675 meters and from south to north 220 meters. The fortress consists of 56 round towers, which had served as watchtowers. The large size of the bricks of the fortress (40 x 28 x 10 cm, 27 x 27 x 5 cm) testifies that this fortress was built in the ancient times. The walls have many holes and places from where arrows can be short. This is complex architectural planning consists of three parts (citadel and two open grounds). Judging by the shape and forms of the bricks, discoveries of the piece of pottery, researchers established that the construction of the fortress continued during the reign of the Kushans.