Un ballo in maschera is an 1859 opera in three acts by Giuseppe Verdi. The text, by Antonio Somma, was based on Eugène Scribe's libretto for Daniel Auber's 1833 five act opera, Gustave III, ou Le bal masqué. Wikipedia
Arias: Saper vorreste, Volta la terrea, Eri tu che macchiavi quell'anima, and more
Composer: Giuseppe Verdi
First performance: February 17, 1859, Tor di Nona
Librettist: Antonio Somma
Written: January 9, 1858