The watchtower was a post of supervision from far away over the enemy. Strengthening represents the rectangular platform focused by corners on parts of the world, surrounded with pakhsovy walls with towers on corners. East tower known under the name Akkesene, round in the basis, with a diameter of 11 m, remained on height in 14 m is allocated, in a vertical section has a cone-shaped form. The remains of steps and arches of an internal spiral staircase were remained with an exit upward. It was used as a watchtower till XVII century.