The surviving second and third acts of Catone in Utica, one of Metastasio’s most dramatic libretti, premiered in Verona in the spring of 1737 in a setting by Vivaldi, contain some of his finest, most mature, and most original arias, and are published here for the first time. They evince a potential dramatic intensity that makes us regret all the more the loss of the first act. Only one aria of Act I can be definitely recovered from a surviving opera, but the rest has now also been successfully r...