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 Fenice La Fenice Teatro La Fenice (, "The Phoenix") is an opera house in Venice, Italy. It is one of "the most famous and renowned landmarks in the history of Italian theatre", and in the history of opera as a whole. Especially in the 19th century, La Fenice became the site of many famous operatic premieres at which the works of several of the four major bel canto era composers – Rossini, Bellini, Donizetti, Verdi – were performed. Its name reflects its role in permitting an opera company to "rise from the ashes" despite losing the use of three theatres to