I think it's necessary to put it in context that it supposedly was stashed away on purpose in a tunnel amid wartime secrecy in a part of northeastern Germany (now part of Poland) that was off in the mountains during the turbulence near the end of the war when things were falling apart for the Germans. They were trying to set up stay-behind networks of fighters in places in Bavaria while hiding stolen art works in other places ("Monument Men"). Fortunately a lot of those efforts went for naught, but who knows what got buried where.