The Freilichtbühne Loreley (Loreley Open-Air Theatre) is an amphitheatre located on top of the Lorelei rock in St. Goarshausen, Germany. Designed by Hermann Senf, it was built between 1934 and 1939 as one of the Nazi Thingplätze and is one of the best known of them. It has continued in use since World War II, initially mainly for theatrical performances and since 1976 mainly for rock concerts.