Mata Bejid Castle is a rectangular fortress built originally during Muslim era. It has two towers on both sides, quite deteriorated, the one on the North consists of an interior room covered with a pointed vault (keep), and the one on the South has a low solid body and the upper one habitable. The castle is divided into two large areas, the main square (it was converted in recent times into a farmhouse, of which the arches of the zahúrdas that overlooked this large courtyard are preserved) and the Islamic fortress (a higher niver with respect to to the rest of the castle).
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.