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).
I masnadieri I masnadieri ("The Bandits" or "The Robbers") is an opera in four acts by Giuseppe Verdi to an Italian libretto by Andrea Maffei, based on "Die Räuber" by Friedrich von Schiller.