Bäckaskog Castle was originally a monastery built in the 13th century. It was transformed into a castle in the 16th century. The castle is located on the isthmus between Ivö Lake (Scania's largest lake) and Oppmanna Lake. The monastery was closed down by the Danish Crown in 1537 during the Reformation. In 1584-1653, the noblemen Henrik Ramel and his son Henrik Ramel Junior gave the castle its present appearance. Today it is a hotel and restaurant.
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.