After the original Benedictine Abbey on the Altmünster Plateau had been destroyed in 1542, the monks built a new abbey or Neumünster in 1606 in the Grund. This in turn was destroyed by fire in 1684 but was rebuilt on the same site in 1688 and extended in 1720. After the French revolution, it served as a police station and prison before becoming a barracks for the Prussians after Napoleon's defeat in 1815. From 1867, it once again became a state prison. During World War II, the Nazis used the Abbey to imprison political resisters to their occupation of Luxembourg. Among the most notable of those political prisoners was Luxembourg's best-known sculptor Lucien Wercollier.
Today Neumünster Abbey is a public meeting place and cultural centre. Since 1997, it has been the home of the European Institute of Cultural Routes.
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.