Frohburg Castle area was already inhabitated in Bronze and Roman Ages. In the 10th century the local Frohburg noble family ruled the area and built the castle. It was enlarged during the Middle Ages and also an iron furnace was established.
Frohburg family line died out around in 1367 and the castle was left to decay. Later the stones were reused by local farmers. Today the ruins are one of the most popular sights in Olten area.
The Beckov castle stands on a steep 50 m tall rock in the village Beckov. The dominance of the rock and impression of invincibility it gaves, challenged our ancestors to make use of these assets. The result is a remarkable harmony between the natural setting and architecture.
The castle first mentioned in 1200 was originally owned by the King and later, at the end of the 13th century it fell in hands of Matúš Èák. Its owners alternated - at the end of the 14th century the family of Stibor of Stiborice bought it.
The next owners, the Bánffys who adapted the Gothic castle to the Renaissance residence, improved its fortifications preventing the Turks from conquering it at the end of the 16th century. When Bánffys died out, the castle was owned by several noble families. It fell in decay after fire in 1729.
The history of the castle is the subject of different legends.