Costantino il grande

Cornel Wilde

Constantine

Belinda Lee

Fausta

Massimo Serato

Maxentius

Christine Kaufmann

Livia

Fausto Tozzi

Hadrian

Tino Carraro

Emperor Maximianus

Carlo Ninchi

Constantius Chlorus

Vittorio Sanipoli

Apuleius

Elisa Cegani

Elena

Nando Gazzolo

Licinius

Annibale Ninchi

Galarius

Franco Fantasia

Roman Soldier

Loris Gizzi

Roman Prosecutor

Enrico Glori

Livia's Father

?

Jole Mauro

Celi, Fausta's Maid