Kolagiri Fortress was built between 1788 and 1798 by the wife of King Erekle II, Queen Darejan. The structure stands seven meters high in a square shape and covers 2,000 square meters.
There are large, cylindrical, four-story towers in each of the four corners, which the defenders of the fortress used as living areas.
On the second story, a military walkway, 1.5 meters wide, encircles the entire fortress. The façade of the gateway of the fortress wall is decorated with stones depicting lions and rhombus-shaped brick ornamentation.
As soon as the gateway opens, the medieval environment is astounding. Queen Darejan also built a small hall-type church here, where a convent is active today.
Kolagiri Fortress is 16 kilometers away from the city of Bolnisi.