Thierstein Castle was built in the early 14th century by Albrecht VI of Wildstein. Later it was moved to the hands of Nuremberg burgraves and the house of Hohenzollern. In 1553, during the Second Margrave War, Thierstein was occupied by Bohemian troops. In 1603 Margrave Georg Friedrich of Brandenburg ordered to abandon the castle and the construction of a new office building outside the village of Thierstein. Nevertheless, the most necessary repairs were still carried out at the Thierstein castle during the Thirty Years' War. The end of the Thierstein castle came in 1725, when it was destroyed by fire.
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.