Demetrius and the Gladiators

Rome, soon after the death of Christ. The depraved and mad Caligula is on the throne, obsessed with two things: the Robe, the garment that fell from Jesus' shoulders on the cross, and brutal gladiatorial displays. Victor Mature is the devout Christian entrusted with the Robe by Peter (Michael Rennie). But he turns his back on God, enters the arena, and becomes the most famous gladiator in Rome. Sharing the bed of the powerful and diabolical Messalina (Susan Hayward), he may even betray the Robe - and any hope he has for redemption! (official distributor synopsis)