Prudnik Castle was located in the defensive bend of the Prudnik river. It was built in 1255. It was founded a Czech knight Wok of Rosenberg.
The castle was destroyed in 1428 by the Hussites. After the end of the first Silesian War, Frederick the Great rebuilt the castle.
A fire on 27 August 1806 burnt the entire castle except of one tower called 'Wok's Tower', which is now the only remnant of the castle.
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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.