Ubisa is a small village and a medieval monastic complex in Georgia. It comprises a 9th-century St. George’s Monastery founded by St. Gregory of Khandzta, a 4-floor tower (AD 1141), fragments of a 12th-century defensive wall and several other buildings and structures.
The monastery houses a unique cycle of murals from the late 14th century made by Damiane apparently influenced by art from the Byzantine Palaiologan period (1261-1453).
The monastery is also known for its honey made by the monks.
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.