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