The Schwanenburg Castle, in North Rhine-Westphalia, where the Dukes of Cleves resided, was founded on a steep hill. It was first mentioned in 1020 in the monastery annals. The massive 55m high tower, the Schwanenturm (Swan tower), is associated in legend with the Knight of the Swan, immortalized in Richard Wagner's Lohengrin.
The knight's hall, built around 1170, stood where today the car park surrounded by lime trees is located in the outer courtyard. Remains of the richly decorated hall have been excavated in the courtyard of the castle and can be seen today.
In 1663, the Stadtholder of the Great Elector; John Maurice, Prince of Nassau-Siegen approved a renovation of the Schwanenburg in the Dutch Baroque style by architect Pieter Post and commissioned the construction of extensive gardens that greatly influenced European landscape design of the 17th century. Significant amounts of his original plan for Kleve were put into effect and have been maintained to the present, a particularly well-loved example of which is the Forstgarten.
In the middle of the 18th century, the building was reduced by collapse and demolition to its present size. Since then, the judicial authorities are located at the castle, and today the castle is the seat of the district and district court of Kleve. In the Swan Tower, a small geological museum is located.
On 7 October 1944, Kleve was subjected to a huge bombardment. These attacks resulted in huge damage to the town. The bombardment destroyed the historic centre of Kleve, including the Swan tower. The castle was rebuilt between 1948 and 1953.
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.