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.
| Directing | Dino Risi | Director |
| Writing | Gérard Brach | Writer |
| Writing | Agenore Incrocci | Writer |
| Writing | Dino Risi | Writer |
| Sound | Guido De Angelis | Original Music Composer |
| Sound | Maurizio De Angelis | Original Music Composer |
| Production | Claude Baks | Producer |
| Production | Manolo Bolognini | Producer |
| Production | Georges Dybman | Producer |
| Production | Renzo Rossellini | Producer |
| Camera | Armando Nannuzzi | Director of Photography |
| Art | Dante Ferretti | Production Design |
| Art | Francesca Lo Schiavo | Set Decoration |
| Costume & Make-Up | Raffaella Leone | Costume Design |
| Costume & Make-Up | Gabriella Pescucci | Costume Design |
| Camera | Benoît Eon | Still Photographer |
| Production | Jean-Pierre Rassam | Producer |
