Although Siersberg Castle was first mentioned in 1178, it was probably already built in the 11th century. It was built atop an almost 300-meter-high mountain overlooking the valleys of the rivers Saar and Nied.
During the Thirty Years' War, in 1634, the castle was taken by French troops. In the next decades it was taken and retaken several times by both parties, which of course caused damage to the castle. In 1670 the French again occupied Lorraine. When they retreated again in 1677 they partly blew up the, by then already dilapidated, castle. After that, Sierberg increasingly lost its military importance and its decay progressed.
References:The Château de Chantilly comprises two attached buildings: the Petit Château built around 1560 for Anne de Montmorency, and the Grand Château, which was destroyed during the French Revolution and rebuilt in the 1870s. Owned by the Institut de France, the château houses the Musée Condé. It is one of the finest art galleries in France and is open to the public.
The estate"s connection with the Montmorency family began in 1484. The first mansion (now replaced by the Grand Château) was built in 1528–1531 for the Constable Anne de Montmorency by Pierre Chambiges. The Petit Château was also built for him, around 1560, probably by Jean Bullant. In 1632, after the death of Henri II, it passed to the Grand Condé who inherited it through his mother, Charlotte Marguerite de Montmorency.
Several interesting pieces of history are associated with the château during the 17th century.