Brahetrolleborg is a castle was known as Cistercian Holme Abbey before the Reformation. The abbey was founded and settled in 1172 from the Cistercian Herrevad Abbey in Scania, now in Sweden, of which it was a daughter house. It was secularised during the Reformation, probably in 1536.
After the abbey was secularised and taken into the possession of the Danish Crown, the Crown released it into private ownership. In 1568 it became the property of Heinrich Rantzau, from whom it acquired for a time the name Rantzausholm. After reverting again to the Crown in 1661, it was granted in 1664 by King Frederick III of Denmark to his court favourite, the German merchant and politician Christoffer Gabel, who exchanged it three years later for the chalk mountain of Segeberg with Birgitte Nielsdatter, of the Trolle family and married into the Brahe family, whence the name of the castle and also of her barony, Brahetrolleborg. The Trolles sold it in 1722 to Christian Detlev von Reventlow, the Oberpräsident of Altona, and the estate has remained until today in the Reventlow family.
The former Cistercian church, laid out according to the plan of Saint Bernard, is now the chapel of Brahetrolleborg. It has a tower on the west front, and possesses a crucifix by Claus Berg of about 1500. The conventual buildings, located to the right of the church, were converted after secularisation for use as a castle, which was comprehensively overhauled in about 1870.
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.