Henneburg Castle lies on a hill on the right bank of the Main River in the town of Stadtprozelten. Schenken von Klingenberg family built it as a border fortification around 1200. It was the residence of the Teutonic Order for almost 200 years and last served as the official residence of the noble Mainz Amtskeller officials.
It was deserted in the 16th century andfell into disrepair over time. The castle grounds are broken down into the upper castle, consisting of a fortification and main castle, as well as the outdoor grounds with moat and rampart and the defensive wall on the Main river side. The fortifications surrounding the upper castle, several castle gates, seven wall towers or their remains, both Great Hall ruins, the large and small keep and the roughly 150 metre long underground wall-walk accessible through exits in the wall towers, which links the south-west gateway to the northern part of the castle remain intact.
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.