Riseberga Abbey was a nunnery founded by the Order of Cistercians around the year 1180. The land property of the abbey was donated by Earl Birger Brosa in 1202. After his death Brosa’s wife, Queen consort Brigida Haraldsdotter, moved to Riseberga and she was one of the most famous nuns in the abbey. Brigida has also buried there.
Riseberga became soon very rich and powerful abbey. In the 13th century it owned 224 farms, mines, churches and other properties. In 1384 it was anyway plundered, probably by mercenaries. The destruction began in 1527 when the abbey was returned to the Crown during the Reformation. Former nuns lived there until 1534. The abbey was destroyed by fire in 1546. Later abbey ruins were used to build other buildings nearby. Today only one wall stands still.
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.