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).
Il turco in Italia Il turco in Italia (The Turk in Italy) is an opera in two acts by Gioachino Rossini. The Italian-language libretto was written by Felice Romani. It was a re-working of a libretto by Caterino Mazzolà set as an opera (with the same title) by the German composer in 1788.