Schwarzenberg Castle was based on a medieval fortification and together with St. George's Church dominates the scene of the large county town of Schwarzenberg.
The castle was probably founded in the 12th century as a fort and was the original base for the settlement of Schwarzenberg and its vicinity. The former castle was given its present appearance by a conversion into a hunting lodge for the Electorate of Saxony from 1555 to 1558. In 1851-52 its keep and south wing were raised and, in 1875-76, an office building extension was added.
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.