Anton Haizinger heard Haizinger sing in concerts, and offered him an engagement at the theatre; Haizinger gave up teaching. Haizinger's first roles at Theater an der Wien, in 1821, were in two operas by Rossini, as Gianetto in "La gazza ladra" and Lindoro in "L'italiana in Algeri". He soon became well-known in Vienna. The role of Adolar in Weber's opera "Euryanthe", premiered in 1823 at the Theater am Kärntnertor, was created for him, and he was a soloist in the premiere in 1824 of Beethoven's Ninth Symphony at the same theatre. He continued studies with Antonio Salieri. At this time, Italian opera
Loreley (opera) his "Edgar" for a La Scala production in 1889. The world premiere of "Loreley" finally took place on 16 February 1890 at the Teatro Regio in Turin conducted by Edoardo Mascheroni. The production, with Virginia Ferni-Germano in the title role, had sets by Ugo Gheduzzi and costumes designed by Adolf Hohenstein. It proved to be Catalani's most enduring work, surpassed only by his last opera "La Wally". In the years following the Turin premiere, "Loreley" was performed in multiple Italian cities, including Milan where it was first performed at La Scala in 1905. It subsequently premiered at London's Royal Opera