Simon Boccanegra and L'elisir d'amore, are operas?
Simon Boccanegra Simon Boccanegra (] ) is an opera with a prologue and three acts by Giuseppe Verdi to an Italian libretto by Francesco Maria Piave, based on the play "Simón Bocanegra" (1843) by Antonio García Gutiérrez, whose play "El trovador" had been the basis for Verdi's 1853 opera, "Il trovatore".
Don Gregorio (opera) Don Gregorio is an 1826 opera by Gaetano Donizetti from a libretto by Jacopo Ferretti and adapted from his popular 1824 opera buffa L'ajo nell'imbarazzo ("The Tutor Embarrassed"), which had enjoyed considerable success when presented at the Teatro Valle in Rome on 4 February 1824.