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
Norma (opera) engaged by La Scala for her debut during the following season. Bellini and Romani then began to consider the subject of the coming autumn's opera. By the summer, they had decided to base it on Alexandre Soumet's play which was being performed in Paris at around that time and which Pasta would have seen. For the forthcoming autumn/winter season, La Scala had engaged Giulia Grisi (the sister of Giuditta Grisi) and the well-known tenor Domenico Donzelli, who had made a name for himself with Rossini roles, especially that of Otello. They would fill the roles of Adalgisa and Pollione. Donzelli