Hohenzollern Castle
With over 350,000 visitors per year Hohenzollern castle is one of the most visited castles in Germany. The castle is privately owned by the House of Hohenzollern, with two-thirds belonging to the Brandenburg-Prussian branch, and the balance to the Swabian branch. Since 1952, the Princess Kira of Prussia Foundation has used the castle for an annual summer camp for children. Whenever Prince George and his family are staying at the castle, the Prussian flag flies over the castle.
Project Riese
Książ Castle (German: Fürstenstein) is located in the city of Wałbrzych (German: Waldenburg) . Its last owner in the inter-war period was the Hochberg family, one of the wealthiest and most influential European dynasties, Hans Heinrich XV, Prince of Pless and his English wife, Mary-Theresa Olivia Cornwallis-West (Princess Daisy). As a result of their extravagant lifestyle and the global economic crisis they fell into debt. In 1941, the castle and the lands were seized by the Nazi government, partly to pay taxes, partly as punishment for the perceived treason of their sons. At that time one of them served in the British Army, another in the Polish Armed Forces in the West. The castle, under the leadership of architect Hermann Giesler, was first adapted to accommodate the management of the state-owned railways (Deutsche Reichsbahn) but in 1944 it became part of Project Riese. In 1941–1944, it was also a place where parts of the collection of the Prussian State Library had been hidden.