Wewelsburg

Wewelsburg is a Renaissance castle located in the village of Wewelsburg, which is a district of the town of Büren, Westphalia, in the Landkreis of Paderborn in the northeast of North Rhine-Westphalia, Germany. The castle has a triangular layout, with three round towers connected by massive walls. After 1934 it was used by the SS under Heinrich Himmler, and was to be expanded into a complex which would serve as the central SS cult-site.After 1941, plans were developed to enlarge it to be the so-called "Centre of the World". In 1950, the castle reopened as a museum and youth hostel. The castle today hosts the Historical Museum of the Prince Bishopric of Paderborn and the Wewelsburg 1933–1945 Memorial Museum.

Source: Wikipedia