In addition to participating in the defense of the city, the Armenian community participated in the construction and maintenance of the fortress walls of the city. In part, some fortifications such as the Armenian Bastion have survived to this day. The bastion was built before the 16th century. It is located on the third terrace from the Fortress Bridge, which dominates the western one. At the beginning of the 17th century, the Armenian bastion was already heavily destroyed. Work on its restoration and modernization was carried out in the late 17th century. In the 1930s, earthen parapets were erected on the bastion, and later they were rebuilt in stone by the military engineer K.Dalke. The last reconstruction of its upper part was carried out in the 60s of the 18th century.

Architecture of the building can be classified as an early small bastion with an obtuse forming angle. Built of stone and placed on rocky ledges. The plan is a hexagon, open on the eastern and urban sides. The outer planes are made with a slight positive slope. The space inside is filled. The height of the walls varies: maximum reaches 12 meters from the base of the rock on the west side. In the general system of fortifications of the city, the Armenian bastion was one of the main links of defense, as it protected one of the three entrances to the city.