The Château des Rohan is a former castle and weapons factory now serving as a museum and cultural centre in the French town of Mutzig. The castle's history goes back to the fortification of the town in 1274 by Rudolph of Habsburg. The medieval castle was heavily destroyed by the Swedes in 1632, during the Thirty Years' War, after having already been assaulted by Ernst von Mansfeld's troops in 1622. The city's and castle's masters, during these times marked by frequent battles and rivalries between feudal families, were alternatively and sometimes simultaneously the bishops of Strasbourg and the House of Zweibrücken.
The castle as it now appears is a Baroque structure. It was inaugurated in its present shape in 1673 to serve as the residence of the bishop of Strasbourg, Franz Egon of Fürstenberg. Fürstenberg was succeeded by his brother Wilhelm Egon von Fürstenberg. After the family of Rohan took over the bishopric of Strasbourg, the castle served as a residence to the dukes Armand Gaston, François-Armand, Louis Constantin and Louis René Édouard de Rohan, between 1704 and 1790.
However, after the completion of the Palais Rohan of Strasbourg in 1742, the château, which had already been rivalled by the residences in Saverne, became only of secondary importance to the family. Mutzig's castle was disowned and pillaged during the French Revolution. In 1799, it was bought by the arms manufacturers, brothers Coulaux of Klingenthal who in 1801 opened their weapons factory in its walls.
The factory ran until the outbreak of the Franco-Prussian War in 1870. The castle was fortified again by the Germans in 1893. Today, the castle houses a cinema and a library as well as, since 1996, the municipal museum Musée régional d'armes displaying a vast collection of historic rifles.References:
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.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.