 The transfer of Hitler's Linz collection from the repositories to the salt mine took 13 months to complete, and utilized both tanks and oxen when the trucks could not navigate the steep, narrow and winding roads because of the winter weather.The final convoy of purloined art arrived at the mine in April 1945, just weeks before V-E Day.The labyrinthine salt mine has a single entrance, and a small gasoline-powered narrow-gauge engine pulling a flat car was utilized to navigate to the various caverns created by centuries of salt mining.