Watch Online HD on HDtoday. Giuseppe Verdi's one prologue, three act opera featuring libretto by Francesco Maria Piave and Arrigo Boito is performed before a live audience at Florence's Teatro Comunale in this release featuring the music of the Orchestra and Chorus of the Maggio Musicale Fiorentino under conductor Claudio Abbado, and starring Carlo Guelfi, Julian Konstantinov, and Karita Mattila.