King's Dagobert I intestinal and sexual problems loom large as he survives an attack on his royal caravan then barely makes it to Rome to personally give thanks to the Pope. After he arrives at the Vatican, he becomes involved in the battle between two contenders for the papacy and has to face the machinations of a ruthless Byzantine princess.
| Actor | Role |
|---|---|
 ColucheDagobert 1er | Dagobert 1er |
 Michel SerraultOtarius | Otarius |
 Ugo TognazziLa pape Honorius et son sosie | La pape Honorius et son sosie |
 Carole BouquetHéméré | Héméré |
 Isabella FerrariChrodilde | Chrodilde |
 Michael LonsdaleSaint Eloi | Saint Eloi |
 Sabrina SianiBerthilde | Berthilde |
 John KarlsenCorbus | Corbus |
 Romano PuppoArgobal | Argobal |
 Geretta GerettaLa Snake Charmer (uncredited) | La Snake Charmer (uncredited) |
 Gea MartirePhilliria | Philliria |
 Claudia CavalcantiFredegonde | Fredegonde |
 Ippolita SantarelliNot listed | Not listed |
 Angelo SusaniNot listed | Not listed |
 Antonio VezzaNot listed | Not listed |
| Geretta GerettaNot listed | Not listed |