Part of Tutto Verdi series - Un ballo in maschera (2011) Parma. Based on a Scribe libretto and begun as 'Gustavo III' set in Sweden, it became 'Una vendetta in dominò' set in Germany, and finally 'Un ballo', set not in Sweden but in Boston, Massachusetts during the colonial era. These changes were caused by a combination of censorship regulations in both Naples and Rome, as well as by the political situation in France in January 1858.