Gaetano Donizetti’s 64th opera, Don Pasquale of 1843, represents both the zenith and the end of opera buffa since it stands as one of the finest examples of the genre, and yet there are practically none written after that date that are still in the standard repertoire. Set in Rome, it sees the ageing Don Pasquale disinherit his nephew Ernesto, who loves the young but poor widow Norina, for refusing the woman he had found for him. Even Don Pasquale’s own doctor...