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
Fierrabras (opera) Fierrabras (opera) Fierrabras, 796, is a three-act German opera with spoken dialogue written by the composer Franz Schubert in 1823, to a libretto by , the general manager of the Theater am Kärntnertor (Vienna's Court Opera Theatre). Along with the earlier "Alfonso und Estrella", composed in 1822, it marks Schubert's attempt to compose grand Romantic opera in German, departing from the Singspiel tradition. The Kärntnertor Theater in 1822 commissioned operas from Schubert and Carl Maria von Weber in a drive to increase the number of German operas in repertoire. Schubert fulfilled his commission with "Fierrabras", von Weber his with "Euryanthe".