The ancient Desenzano castle was originally built around the year 1000. Enlarged at the end of the 15th century, the castle never became a real military fort, but served primarily as a refuge for the population. The plan of the castle is an irregular rectangle, with the tower that stands out at the entrance on the northern side, protecting the drawbridge, which loopholes for the chains are still preserved. The castle is open to the public.
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.