Once two-part Langendorf Castle was built in the 12th and 13th centuries as main and fore-castle surrounded by a moat. The round corner-tower of the late-gothic manor house dates back to the 15th century, as does the oldest part of the manor house. The more recent part of the manor house includes the chapel bay window and the courtrooms. The fore-castle with three wings was renovated in the 16th century, of which only the west wing has been preserved until today.
Today Langendorf castle is one of the best preserved and maintained moated castles in the Rhineland. Regular concerts are held there, entitled 'Concert in the Outbuilding' for up-and-coming young artists.
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.