Furtwangler, Wilhelm. 20 February 1944, Vienna State Opera Wagner: Tristan und Isolde with Julius Polzer, Herbert Alsen, Anny Konetzni, Paul Schoffler. Last performance of Furtwangler, Wilhelm at the Vienna State during World War II. Playbill. Because of the paper ration during World War II, the Vienna State Opera programs were reduced to these small playbills. Extremely rare.