Heilig Kreuz (Holy Cross) Monastery was founded at the end of the 12th century by Dietrich the Oppressed, Margrave of Meißen. It was for the Benedictine nuns. Its buildings were initially located between Burgberg and Elbe on the site of a former moated castle (today's Leipziger Strasse 30 to 40).
In 1217 the monastery was relocated to the left bank of the Elbe, approx. 1.5 km north of the old town of Meißen. A church building was erected in the first half of the 13th century.
After Reformation, the monastery was closed in 1568. The monastery building itself was left to decay and finally destroyed in the Seven Years' War (1756–1763). From 1945 the site of the monastery served as a garden center. Since 1994 it has been the seat of the Meißner Hahnemannzentrum e. V., which had security work carried out on the buildings.
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.