The Counts of Cappenberg, who were related to the
Salians and the
Staufers, were a rich and powerful family. During the
Investiture Controversy, when they supported Duke
Lothar von Supplinburg against
Emperor Heinrich V, Count and his brother led their armies against
Münster in February 1121 under the leadership of Duke Lothar. A great part of the town was destroyed, and the old
cathedral was burnt down. Before the Emperor could bring them to trial for violation of the peace of the realm, Gottfried – either out of genuine repentance or out of fear of the Imperial judgment - gave the greater part of his estates in Westphalia to the founder of the
Premonstratensian Order,
Norbert of Xanten, renounced worldly life and withdrew into a monastery, where, according to contemporary custom, he was immune from punishment. After the ratification of the
Concordat of Worms in 1122 he reappeared as Gottfried II, last Count of Cappenberg (afterwards better known as Saint Gottfried). Against the wishes of his family he founded a Premonstratensian monastery in his ancestral castle on the Cappenberg, Cappenberg Abbey (Kloster Cappenberg). For his wife, Ida, daughter of Count Friedrich von Arnsberg, and his sisters Gerberga and Beatrix, he built a nunnery next door. The monastery was economically successful, and accumulated considerable wealth, as may still to some extent be seen from the surviving abbey church. The monastery was largely destroyed during the
Thirty Years' War. The present
Baroque premises in three ranges were built from 1708 onwards. After an existence of almost 700 years the monastery was dissolved in 1803 and became an estate of the
Prussian crown. After periods under the rule of France and of the
Duchy of Berg, the estate was regained in 1815 by Prussia and in 1816 was acquired by the former Minister of State the
Baron vom Stein, who renovated the buildings and thus preserved them from dereliction. After the extinction of the family von und zum Stein the estate was inherited in 1926 by the family of the Counts of Kanitz. During
World War II Schloss Cappenberg served as a place of safety to protect works of art from
Allied bombing, including the collections of the
Museum für Kunst und Kulturgeschichte Dortmund ("Dortmund Museum of Art and Cultural History"), which were stored here, along with art treasures from various destroyed churches of Westphalia, as for example the
Marienaltar by
Conrad von Soest from the
Marienkirche in
Dortmund. From 1946 the collection of the
Museum für Kunst und Kulturgeschichte was exhibited in the castle. The return of the collection to Dortmund did not take place until the opening of the new museum building in 1983. In 1985 the
Landschaftsverband Westfalen-Lippe (Administrative and planning authority for the region
Westphalia and
Lippe within the
Land Northrhine-Westphalia) and the local authority of
Kreis Unna rented rooms in the castle and converted them for use as a museum. Since then, in conjunction with the
Stiftung Preußischer Kulturbesitz, various exhibitions have been held here. In the west wing are kept the archives of Freiherr vom Stein, who lived in the castle from 1824 until his death in 1831, and also the archives of the former monastery. In the former abbey church is a portrait bust of the period around 1160 of the Emperor
Frederick Barbarossa made of gilt bronze. Nowadays Schloss Cappenberg is an excursion destination, with a museum, and is part of the
Route der Industriekultur ("Industry Heritage Trail"). Art exhibitions and concerts are regularly held there. ==Abbey church==