Sundbyholm was originally owned by the Order of St. John, who had an abbey in Eskilstuna. After the Reformation it was confiscated to the Crown. The Sundbyholm Castle was built by the Admiral of the Navy Carl Gyllenhielm, son of King Charles IX of Sweden. The estate was given to him in 1627. The castle was later enlarged by Seved Bååts.
Sundbyholm Castle is known for the beauty of its grounds and nearby environs. It has been the subject of several paintings and drawings, the most famous of which is "The Old Castle" by Prince Eugen, Duke of Närke.
Today Sundbyholm is a hotel and offers facilities for conferences, parties and weddings.
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.