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:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.