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
La fille du régiment beautiful and worthy for the cordial hospitality which France offers him in all her theatres, subsidized or not." Despite its bumpy start, the opera soon became hugely popular at the Opéra-Comique. During its first 80 years, it reached its 500th performance at the theatre in 1871 and its 1,000th in 1908. The opera was first performed in Italy at La Scala, Milan, on 3 October 1840, in Italian with recitatives by Donizetti replacing the spoken dialogue. It was thought "worthless" and received only six performances. It was not until 1928 when Toti Dal Monte sang Marie that the opera began