Corvey Castle

Very nice, always worth a visit.

The Corvey Monastery contains the oldest and only almost completely preserved Carolingian western work in the world, as well as unique archaeological relics from the Carolingian period. Must see!

Corvey was an important Carolingian monastery and possessed one of the most valuable libraries in the country. The abbey developed into a cultural, intellectual, and economic center in Saxon territory in the 9th and 10th centuries. After a period of crisis, Corvey became a reformed monastery in the 11th century. Later, it built a closed territory as the "Imperial and High Princely Abbey of Corvey," but declined in importance in the late Middle Ages. As a princely abbey, Corvey belonged to the Lower Rhine-Westphalian Imperial Circle in the early modern period.The consequences of the Thirty Years' War threatened the abbey's existence. However, starting in the late 17th century, the church and monastery buildings were rebuilt in the Baroque style. Subsequently, the abbey again lost its importance and appeal. In 1792, at Pope Pius VI's own initiative, the monastery was transformed into a prince-bishopric. As early as 1803, the territorial independence was abolished by the Imperial Deputation Act, but the diocese remained in existence until 1825. In 1820, Corvey came into the possession of Landgrave Victor Amadeus of Hesse-Rotenburg. Corvey passed through inheritance to its current owners, the Dukes of Ratibor from the Hohenlohe-Schillingsfürst line.
Source: de.wikipedia.org/wiki/Corvey