Rohan Castle (French: Château des Rohan, German: Rohan-Schloss), also known as Château Neuf (New Castle), is a Neoclassicist monumental building in the city of Saverne in Alsace, France. The 140 meter wide façade of red Vosges sandstone is considered to be one of the most impressive examples of its kind.
The building was erected between 1780 and 1790 by the architect Nicolas Salins de Montfort on the site of the previous building, which had been built in 1670 and burned down in 1779. This previous building had in turn replaced the small Château Vieux (Old Castle) of 1417, which is still preserved today. The architect had been commissioned by the Strasbourg Prince-Bishop Louis René Édouard de Rohan-Guéméné, who also resided in the magnificent Rohan Palace in the city where he held office. By the time of the outbreak of the French Revolution, only the outside was completed. When cleric rule was abolished, the building lost both its owner and its function. The gradual decline of the building was stopped under Napoleon III, who had it renovated and extended in the direction of the city. Already in 1853, the park was irrevocably cut and destroyed by the Marne-Rhine Canal. Since 1858, the castle houses a city museum (history, decorative arts, a large archaeological department), which was joined by the art and ethnographic collection of the politician Louise Weiss in the 20th century. Previously, the castle had served at times as a home for officers' widows and, after the Franco-Prussian War, as a barracks.