Książ Castle

During World War II, the Nazis altered Ksiaż Castle and built underground tunnels connected with Project Riese. The exact intended purpose of the wider Riese complex is still debated, which is part of why the castle attracts history-focused visitors.

The castle is strongly associated with the Hochberg family, one of the major aristocratic families of Lower Silesia. Princess Daisy von Pless, born Mary Theresa Cornwallis-West, is one of its best-known residents.

Yes, Ksiaż is usually listed among Poland's largest castles. It stands near Walbrzych in Lower Silesia and combines medieval origins with later Baroque and 19th-century changes.

Parts of the underground areas connected to the wartime modifications are presented to visitors on guided routes. Those tunnels are tied to the Nazi occupation period, not to the older Hochberg family residence.