Kumurdo Cathedral is situated on Javakheti Plateau, 12 km southwest from Akhalkalaki. According to the inscriptions on the walls, written with the ancient Georgian writing of Asomtavruli, the Kumurdo Cathedral was built by Ioane the Bishop during the reign of king of the Abkhazians Leon III in 964. During the Middle Ages, Kumurdo was an important cultural, educational and religious center. The cathedral was restored twice (1930; 1970–1980), but it stands without a dome.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.