Elisabeth Schwarzkopf
The judges have included Franco Corelli, Carlo Maria Giulini, Klaus Hellwig, Yehudi Menuhin, Arturo Benedetti Michelangeli, Birgit Nilsson, Carl Orff, Aureliano Pertile, Elisabeth Schwarzkopf, Renata Scotto, Joan Sutherland, and Richard Aaker Trythall, Raina Kabaivanska.