Cornel Wilde as Constantine

Belinda Lee as Fausta

Massimo Serato as Maxentius

Christine Kaufmann as Livia

Fausto Tozzi as Hadrian

Tino Carraro as Emperor Maximianus

Carlo Ninchi as Constantius Chlorus

Vittorio Sanipoli as Apuleius

Elisa Cegani as Elena

Nando Gazzolo as Licinius

Annibale Ninchi as Galarius

Franco Fantasia as Roman Soldier

Loris Gizzi as Roman Prosecutor

Enrico Glori as Livia's Father

Jole Mauro as Celi, Fausta's Maid

Nando Tamberlani as

Renato Terra as

Giuseppe Addobbati as

Lia Angeleri as

Fedele Gentile as

Piero Giagnoni as

Gino Marturano as

Mario Meniconi as

Spartaco Nale as

Ugo Sasso as

Raimondo Van Riel as