The castle called Karlskrone (Karlova Koruna – Charles Crown) was founded in the 14th century by Charles IVth, but the name did not become popular and the castle was further called in Czech according to the hill on which it towers in such an imposing manner. Radyně with which several myths and legends are connected is one of the most imposing ruins of the area of Plzeň, one of the towers is used as observation tower.