Kolagiri Fortress (Fortress of Queen) situated in Kolagiri village, Bolnisi municipality, on the left side Khrami river. 45 km away from Tbilisi. The period of foundation of the fortress is 18th century by Queen Darejan wife of King Erekle II. The function of the fortress was to defense nearby villages. When enemies found out the importance of this place, attempted to interrupt. Nowadays here is a monastery of Queen St. Ketevan.