Nydala Abbey was a medieval Cistercian monastery. Nydala (from Swedish ny, meaning new, and dal, meaning valley) was called Sancta Maria de Nova Valle or just Nova Vallis in Latin. It was founded together with Alvastra Abbey in 1147 as the first cistercian monasteries in Sweden. King Gustavus Vasa appropriated the abbey in the 1520s, and the Danes sacked it in 1568. Part of the abbey church was rebuilt in the following years, and is still used as parish church. Some other ruins also remain visible at the site.
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.