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 Severo Alessandro Severo (Alexander Severus, HWV A13) is an opera by George Frideric Handel composed in 1738. It is one of Handel's three pasticcio works, made up of the music and arias of his previous operas "Giustino", "Berenice" and "Arminio". Only the overture and recitatives (as well as the words) were new. The impresario Johann Jacob Heidegger probably selected the 1717 libretto by Apostolo Zeno, originally written for Antonio Lotti and re-used by many composers thereafter.