Directed by
| Lionello De Felice | ||
| Irving Rapper | ||
Writing Credits (in alphabetical order)
| Michael Audley | ... | (dialogue) |
| Ennio De Concini | ||
| Lionello De Felice | ||
| Diego Fabbri | ||
| Ernesto Guida | ||
| Fulvio Palmieri | ... | (story) |
| Franco Rossetti | ||
| Guglielmo Santangelo | ||
Cast (in credits order)
| Cornel Wilde | ... | Constantine | |
| Belinda Lee | ... | Fausta | |
| Massimo Serato | ... | Maxentius | |
| Christine Kaufmann | ... | Livia | |
| Fausto Tozzi | ... | Hadrian | |
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Tino Carraro | ... | Emperor Maximianus |
| Carlo Ninchi | ... | Constantius Chlorus | |
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Vittorio Sanipoli | ... | Apuleius |
| Elisa Cegani | ... | Elena | |
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Nando Gazzolo | ... | Licinius |
| Annibale Ninchi | ... | Galarius | |
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Franco Fantasia | ... | Roman Soldier |
| Loris Gizzi | ... | Roman Prosecutor | |
| Enrico Glori | ... | Livia's Father | |
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Jole Mauro | ... | Celi - Fausta's Maid |
| Carlo Tamberlani | ... | Diocletian | |
| Renato Terra | ... | Jailer | |
| Giuseppe Addobbati | |||
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Lia Angeleri | ... | Clavia - Christian |
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Fedele Gentile | ||
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Piero Giagnoni | ||
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Gino Marturano | ||
| Mario Meniconi | |||
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Spartaco Nale | ||
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Ugo Sasso | ||
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Rodolfo Van Riel | ||
| Rest of cast listed alphabetically: | |||
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Veriano Ginesi | ... | Torturer |
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Bruno Ariè | ... | Soldier (uncredited) |
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Armando Fracassi | ... | Senator (uncredited) |
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Lauro Gazzolo | ... | Amodius (uncredited) |
| Amerigo Santarelli | ... | Torturer (uncredited) | |
Produced by
| Ferdinand Felicioni | ... | producer |
Music by
| Mario Nascimbene | ||
Cinematography by
| Massimo Dallamano | ||
Editing by
| Mario Serandrei | ||
| Gabriele Varriale | ||
Art Direction by
| Franco Lolli | ||
Costume Design by
| Giancarlo Bartolini Salimbeni | ||
Makeup Department
| Adriana Cassini | ... | hair stylist |
| Duilio Scarozza | ... | makeup artist |
Production Management
| Jacopo Comin | ... | general manager |
| Ferdinand Felicioni | ... | production manager (as Ferdinando Felicioni) |
| Orlando Orsini | ... | production supervisor |
| Giulio Pappagallo | ... | production secretary |
| Mauro Sacripanti | ... | production secretary |
| Marino Vaccà | ... | production supervisor |
| Mauro Sacripanti | ... | unit manager (uncredited) |
Second Unit Director or Assistant Director
| Paolo Bianchini | ... | assistant director |
| Umberto Lenzi | ... | assistant director |
| Maurizio Lucci | ... | assistant director |
Sound Department
| Raffaele Del Monte | ... | sound |
| Franco Groppioni | ... | sound |
Stunts
| Franco Fantasia | ... | stunt coordinator |
| Artemio Antonini | ... | stunts (uncredited) |
| Bruno Ariè | ... | stunts (uncredited) |
| Enrico Chiappafreddo | ... | stunts (uncredited) |
| Vincenzo Maggio | ... | stunts (uncredited) |
| Gino Marturano | ... | stunt actor (uncredited) |
Camera and Electrical Department
| Cesare Allione | ... | camera operator |
| Giovanni Bonivento | ... | assistant camera |
| Giovanni Canfarelli Modica | ... | assistant camera (as Giovanni Canfarelli) |
| Sergio D'Offizi | ... | assistant camera |
Costume and Wardrobe Department
| Cesare Rovatti | ... | assistant costume designer |
Music Department
| Franco Ferrara | ... | conductor |
Additional Crew
| Franco Fantasia | ... | master of arms |
| Joseph E. Levine | ... | presenter |
| Aldo Giuffrè | ... | voice dubbing: Fausto Tozzi (uncredited) |
| Sergio Rossi | ... | voice dubbing: Cornel Wilde (uncredited) |
| Valeria Valeri | ... | voice dubbing: Belinda Lee (uncredited) |
| Luigi Vannucchi | ... | voice dubbing: Massimo Serato (uncredited) |
