 She had an affair with the latter which lasted until 1897.Von Mildenburg made her operatic debut in 1895 at Hamburg, singing the role of Brünnhilde in The Ring Cycle under Mahler's baton.Then, in 1897, she performed the role of Kundry in "Parsifal" at the Bayreuth Festival, and also took on the mezzo-soprano part of Ortrud in "Lohengrin".