Also known as: "Gli Spadaccini della Serenissima".  This U.S.-Italy co-production scasts Orson Welles as the hypnotist Cagliostro, who uses his powers as a means of revenge against King Louis XV's court.  Also features Frank Latimore, Nancy Guild, Valentina Cortese, and Akim Tamiroff.  Directed by Gregory Ratoff.  Dubbed in English, with no subtitles.