Gamburg Castle was built in the mid-12th century by arcbishops of Mainz. Unlike many other castles, Gamburg was indeed renovated several times, such as during the Renaissance, but it was never destroyed and was continuously inhabited. Even during the Peasants' War, it remained intact thanks to the personal intervention of Götz von Berlichingen, making it one of the few castles to do so.
At the center of the castle complex with an almost oval layout stands the Romanesque keep. Surrounding the inner courtyard are the former stables, the so-called Forester's House, and the opposite 'castle,' consisting of the chapel tower, the great hall (Palas), the Middle Building, and the Rear Building, which has housed a chapel since 1921. The inner castle was surrounded by a fortification with six semicircular shell towers, a round corner tower, an outer gate with two round towers, and the moat later transformed into a baroque castle park.
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.