orchestra after a critically-acclaimed public performance there. In 1966 he made his debut at the  Vienna State Opera  conducting  Luchino Visconti 's production of Verdi's  Falstaff , with  Dietrich Fischer-Dieskau  as Falstaff. In 1970 he returned to the State Opera for  Otto Schenk 's production of Beethoven's  Fidelio . Sixteen years