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
Oberto (opera) Oberto (opera) Oberto, Conte di San Bonifacio is an opera in two acts by Giuseppe Verdi to an Italian libretto by Temistocle Solera, based on an existing libretto by Antonio Piazza probably called "Rocester". It was Verdi's first opera, written over a period of four years, and was first performed at the Teatro alla Scala, Milan, on 17 November 1839. The La Scala production enjoyed "a fair success" and the theatre's impresario, Bartolomeo Merelli, commissioned two further operas from the young composer. During his student days in Milan, Verdi began the process of making connections to the world of music