Bella Alten operatic career included six Metropolitan premiere performances – Adele in Die Fledermaus (1905), Gretel in Hänsel und Gretel (1905), Saffi in Der Zigeunerbaron (1906), Olga in Fedora (1906), Columbina in Le Donne Curiose (1912), and Lisetta in L'amore Medico (1914). In November 1905 when she sang Gretel in the premiere Metropolitan performance of Hänsel und Gretel, the composer Engelbert Humperdinck was in the audience. This opera received 11 performances that first season and was selected by Theodore Roosevelt's wife as a benefit for the Legal Aid Society. Alten sang Gretel in this opera every season she was with the Met
Liebe und Eifersucht which became a major influence on the development of German Romantic opera. He wrote his own libretto for the earlier work "Liebe und Eifersucht", based on August Wilhelm Schlegel's translation of a play by Pedro Calderón de la Barca, "La banda y la flor" ("The Scarf and the Flower"). Hoffmann composed the opera in 1807. The opera was not performed in Hoffmann's lifetime. It was first published by Schott in 1999. and premiered at the Ludwigsburger Schlossfestspiele on 27 July 2008, at the Forum am Schlosspark in Ludwigsburg, in a coproduction with the Staatstheater am Gärtnerplatz in Munich, where it