The Château de Guirbaden (or Girbaden) is a ruined castle in the commune of Mollkirch, Alsace. It is situated in the Guirbaden forest, near the village of Mollkirch on the left bank of the Magel River. The castle covers a larger area than any other in Alsace. Dating from the 11th century, over more than 500 years it suffered several attacks, destructions and reconstructions.
Out of the enclosure and the buildings, today only the main dwelling, the keep, sections of the surrounding wall and Saint Valentine’s Chapel remain. It offers a magnificent view of the Plain of Alsace and Bruche Valley.
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.