Baldenau Castle was built by the Trier Elector and Archbishop Balduin of Luxemburg around the year 1320. Initially designed as a hunting lodge, it was later on, beginning in 1324, completed to a residential seat through the construction of additional buildings, stables, and barns. The principal Balduin who initiated the building and gave it his name, was born in 1285 as the youngest son of Count Henry VI. of Luxemburg.
The most impressive part of castle is the keep, 25m height and 10m width. The surrounding moat is 12m wide. During the Thirty Years' War (1618-1648), Baldenau Castle was seriously damaged by Swedish troops, but reconstructed throughout the years 1649-1654. However, only 35 years later, in 1689, the French army devastated 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.