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: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.