She was identified with the part of Erda in Wagner's Das Rheingold and Siegfried, sung first in 1959 at Covent Garden in London, and repeated at the Vienna State Opera and the Teatro Colón in Buenos Aires until 1975. She sang this role at the Bayreuth Festival from 1960 to 1964 and from 1967 to 1975, and from 1964 to 1975 she sang there the First Norn in Götterdämmerung. She died in Müllheim (Baden).
