Człuchów Castle consists of some of the defence walls and the 46-metre tower. The Człuchów stronghold was built during the 14th Century by the Teutonic Order. The exact date of completion is unknown but it is assumed to be the year 1365. During the history, the castle was considered an unconquerable fortress, and was an important element in the defence system of the monastic State. The glory days of the fortress date were up to the year 1772, when it was taken over by the Prussians, while the city fire of 1793 completed the devastation of the building. In order to rebuild the town, the residents were granted consent to deconstruct the Castle, leaving only the tower and fragments of the defence walls. A neo-gothic Evangelical church was added onto the foundations of the former Castle chapel during the years 1826-1828. This church is associated with one of the mysteries; the lost Amber Chamber, supposedly hidden by the Nazis.
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.