The Burg Liebau is the ruin of a spur castle on a flat rock spur on the right flank of the Elster. The castle was first mentioned in a document in 1327. In the 14th century exchanged Plauen Vogt Heinrich the Elder including the castle with the Wettiners and 1441 the castle was owned by the Dölau, of which the castle from 1500 to 1550 graduated like in Renaissance style was rebuilt.
In 1640 the castle was sacked by Swedish mercenaries and the stair tower was set on fire. The castle remained with its last owner Gottlob Christian von Doelau on Ruppertsgruen and his wife Sophia Christina geb. von der Planitz owned it until 1725, was then owned by Johanna Charlotte von Beust until 1742 and then fell into disrepair.
From 1995 to 1997 security work took place in cooperation with the State Office for Archeology and is now a ground monument .
The castle complex on an approximately triangular plateau measuring 50 by 30 meters probably consisted of a defensive and residential tower , the gate tower and a surrounding wall with battlements , further protected by two section trenches that were approx. 5 meters wide and 2 meters deep. The actual castle ruin has the dimensions of 20 to 25 meters. To the east, the complex was protected by a partially natural 20 to 25 meters wide and 5 to 6 meters deep neck ditch with a drawbridge.
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.