Yes, Neuschwanstein Castle served as a major repository for stolen art during World War II. Because of its remote location in the Bavarian Alps and its sturdy construction, the Nazi regime, specifically the Einsatzstab Reichsleiter Rosenberg (ERR), used the castle to store thousands of pieces of looted cultural treasures. These items were primarily stolen from prominent Jewish families and museums in German-occupied France. In 1945, the Monuments Men (the Allied Fine Arts and Archives section) discovered over 6,000 items packed in 1,200 crates inside the castle, including paintings, sculptures, and rare furniture. They also found the meticulous ERR photographic albums that Hitler used to view his stolen "collection." The recovery effort at Neuschwanstein was a massive undertaking that took months to complete, and the castle remains a significant historical site for those studying the systematic plundering of European heritage and the eventual restitution efforts that followed the war.