Frymburk (Friedenburg) castle was founded in the beginning of the 14th century probably by the Lords of Lipá. The castle is surrounded by the River Olešenka and lies next to Nový Hrádek. It has a big round tower, partly collapsed. A water basin is carved in the rock in a small courtyard.
The castle is for the first time mentioned in the year 1354, when it was allegedly in property of not closely known Matyáš of Frymburk. The castle as well as surrounding manors at Nový Hrádek were taken over by Hynek of Dubá and in Náchod (in 1368), but there also appears name of Jinřich of Lipá and Jan of Lichtenberk. In the beginning of the 15th century the manor belonged to Dobruška.
In the course of the Thirty Year’s War the castle was conquered by peasant rebels and some time later it was burnt by Swedish together with Nový Hrádek. It has never been renewed. The ruins are today unstable and dangerous, and therefore not available for public.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.