Lemnitz was a prominent Nazi[1] and was known to boast of having been appointed to the Berlin State Opera by Hermann Göring, commander-in-chief of the Luftwaffe.

[2] In 1936, she made guest appearances at the Royal Opera House in London and at the Teatro Colón in Buenos Aires.

Her repertory included Euridice in Orfeo ed Euridice, Countess Almaviva in Le nozze di Figaro, Pamina in Die Zauberflöte, Elisabeth in Tannhäuser, Elsa in Lohengrin, Eva in Die Meistersinger von Nürnberg, Sieglinde in Die Walküre, Octavian and Marshallin in Der Rosenkavalier, the title role in Arabella, Micaela in Carmen, Elvira in Ernani, the title role in Aida, Desdemona in Otello.

This beautiful voice, this superlative vocalism, this absolute supremacy of the technical and the interpretative in which the economy of gesture lent the whole a spiritual grandeur.

[This quote needs a citation] Lemnitz said of herself: "I am very earnest in my art and consider it as a holy legacy which shall procure some of the higher sense of life to the people.