Frohburg Castle

Trimbach, Switzerland

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.

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Founded: 10th century AD
Category: Castles and fortifications in Switzerland

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Kastelholma Castle

First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.

In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.

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