In the outskirts of Mtskheta are the ruins of Armaztsikhe fortress (3rd century BC). Armaztsikhe was the residence of the Kings of Iberia. This is one of the oldest cities of the Antique Era, which is not fully explored yet. It is also called like Georgian Acropolis. The Greek historian Dio Cassius mentioned this place in his book “The history of Rome”. He wrote that in 65 years BC, Roman Senator Gnaeus Pompeius invaded Iberia and reached this Acropolis too.
Archaeological investigations began in 1943 and three main cultures were identified: the oldest finds were dated to the 1st century BC to 2nd century AD, the central findings on the 3rd-5th centuries, and the latest to the 6th century. Consequently Armaztsikhe was destroyed by the Arabs in the 8th century. There are a royal sarcophagus, vestiges of the ramparts, a fortified tower and supporting pillars, foundation walls of the palace, a bath house, a wine cellar, a pre-Christian temple and a canal system.
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.