One of the few intact medieval castle complexes from the Stauffer period lies high above the romantic Neckar River valley surrounded by vineyards and endless forests. The Guttenberg castle has been in the possession of the barons of Gemmimgen-Guttenberg since 1449. The castle was never destroyed. The complex includes, among others, a local history museum 'Life in a Knight´s 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.