He had a highly fruitful partnership with the Teatro Nuovo in Naples and is best known today for creating roles in the world premieres of numerous operas by Gaetano Donizetti.
[2] Fioravanti's first known stage appearance was in 1817 at the Teatro del Corso in Bologna as Masetto in Wolfgang Amadeus Mozart's Don Giovanni.
In 1818 he was committed to the Teatro San Luca in Venice where he sang Brunone in the world premiere of Gaetano Donizetti's Enrico di Borgogna; notably that composer's first opera to be staged.
He appeared in several world premieres in operas by Donizetti at that house, including Don Sebastiano Alvarez in La zingara (1822), Ortenzio in Il fortunato inganno (1823), Claudio di Liverpool in Emilia di Liverpool (1824), Iwano in Otto mesi in due ore (1827), and Max in Betly (1836).
His repertoire also included a large number of parts in operas by Julius Benedict, François-Adrien Boieldieu, Antonio Cagnoni, Pacini, Errico Petrella, and Lauro Rossi.