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).
Alessandro (opera) Alessandro (HWV 21), is an opera composed by George Frideric Handel in 1726 for the Royal Academy of Music. Paolo Rolli's libretto is based on the story of Ortensio Mauro's "La superbia d'Alessandro". This was the first time the famous singers Faustina Bordoni and Francesca Cuzzoni appeared together in one of Handel's operas. The original cast also included Francesco Bernardi who was known as Senesino.