Falstaff is an operatic commedia lirica in three acts by Giuseppe Verdi, adapted by Arrigo Boito from Shakespeare's play The Merry Wives of Windsor. It was Verdi's last opera, written in the composer's eighth decade, and only the second of his twenty-six operas to be a comedy. It was also the third of Verdi's operas to be based on a Shakespearean play, and like his first adaptation of the English playwright, Macbeth, it concludes with a fugue, the famous "Tutto nel mondo è burla" ("All the world's a joke").