Rehna Abbey is a former Benedictine (the 13th century) and Premonstratensian nunnery (until 1552). It was founded between 1230 and 1236. In 1254 the monastery was inaugurated and this year also began the construction of the cloister between church and convent. In the 14th and 15th centuries, the monastery was one of the most important monasteries Mecklenburg. Numerous Lübeck families had their daughters educated there and funded the monastery with donations.
During the Reformation the monastery was dissolved in 1552. From 1576 to the early 18th century it belonged to Duke widows and princesses Anna Sophia of Prussia (until 1591), Sophia of Schleswig-Holstein-Gottorp (to 1634), Anna Sophie (until 1648) and Juliane Sibylla (to 1761). At the beginning of the 18th century, the remaining buildings were used as offices until 1819. After the Second World War, the abbey was used as a school until 1995.
The late Romanesque brick church have survived from the original monastery, however it was radically altered in the mid-15th century.
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.