The history of Venngarn manor dates to the 12th century. After several owners it was acquired by crown in 1555. Gustav II Adolphus donated Venngarn to Franz von Thurn Berendt and his son sold it to Magnus Gabriel De la Gardie in 1653. The late 17th century was a golden age for Venngarn castle. The present castle was built mainly in 1670 by the architect Jean de la Vallée.
As a chancellor and the leader in Charles XI's regency, De la Gardie was Sweden's most important politicians. Unfortunately for him, due the king's reduction De la Gardie had to return Venngarn later to the crown. Since 1686 the state of Sweden has leased Venngarn castle for several families and purposes. In 1916 a central government institution for alcoholism treatment was established at Venngarn. In 1997 it was sold to its current owners, Wenngarn AB.
There is also a notable chapel in the castle. When the crown took Venngarn 1686, the chapel was completely untouched. None have been added and only a few details have been lost since then. Thus, the chapel one of the country's best preserved church from the Age of Greatness. It was prepared by the De la Gardie, and presumably he also has hired Jean de la Vallee as an architect.
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.