Romilda Pantaleoni is associated with her roles of La Gioconda and Margherita in what opera
La Gioconda (opera) La Gioconda is an opera in four acts by Amilcare Ponchielli set to an Italian libretto by Arrigo Boito (as Tobia Gorrio), based on "Angelo, Tyrant of Padua", a play in prose by Victor Hugo, dating from 1835. (This is the same source as Gaetano Rossi had used for his libretto for Mercadante's "Il giuramento" in 1837).
La Loca (opera) La Loca "(The Madwoman)", also known as Juana la Loca "(Crazy Joanna)," is an opera by Gian Carlo Menotti, composed in 1979. It is a romantic drama about the life of Joanna of Castille (1479–1555). It was written as a vehicle for soprano Beverly Sills and received its premiere on June 3, 1979, at the San Diego Opera, followed by the New York City Opera. Critical response was largely negative, so Menotti completely reworked it. The revised version premiered in 1982 at the Festival of Two Worlds in Spoleto, Italy. The American premiere of the revised version took place at the Spoleto Festival USA in Charleston, South Carolina, on June 1, 1984.