The Rudenz tower was built in the early 13th century. It protected the Gotthard road (Gotthardstrasse) and housed an Imperial customs post. In the 14th century, the right to collect Imperial customs was owned by the Lords of Attinghausen. The first known owner of the tower was Baron Johann von Attinghausen. After Baron Johann von Attinghausen's death around 1360, ownership passed to the Haslital Knight of Rudenz (by virtue of marriage). The tower thus came to be known as the Castle of Rudenz. The Knights of Rudenz were in the service of the Freiherr of Brienz-Ringgenberg and owned castles in Meiringen and Giswil before inheriting the tower at Flüelen. The inheritance was disputed and Johann von Rudenz finally took possession of the castle in the 1370s. As part of receiving the inheritance on 19 June 1365 he granted half the collected tolls to the Canton of Uri. He ruled there for only a few years and died, the last of his line, before 1383.
After the death of Johann von Rudenz, the castle passed through a number of owners. In the first half of the 17th century it was owned by Landammann Johann Heinrich von Brunnen. In 1727 it was acquired by Johann Joachim Epp. Then, in 1815 the Zgaggen family purchased it for 1,900 gulden. They repaired the old tower and returned it to a livable condition. They filled in the old dry moat and planted extensive gardens around the castle. However, over the following centuries, they had to sell off parts of the land and the gardens were replaced with streets and buildings as Flüelen grew. The castle was later sold to the municipality of Flüelen. In 2005 the municipality opened a public park on the castle grounds and opened the great hall for events.
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.