A Greek artisan is commissioned to cast the cup of Christ in silver and sculpt around its rim the faces of the disciples and Jesus himself. He travels to Jerusalem and eventually to Rome to complete the task. Meanwhile, a nefarious interloper is trying to convince the crowds that he is the new Messiah by using nothing more than cheap parlor tricks.

Paul Newman took out ads in the Hollywood trade papers apologizing for his performance in this film.

Saint Peter:
[last lines, Peter is speaking about the Silver Chalice to Basi and Deborra,, and he utters his lines in the tone of a heroic speech] It will be restored, but for years and for hundreds of years, it will lie in darkness; where, I know not. When it is brought out into the light again there will be great cities, and mighty bridges and towers higher than the tower of Babel. It will be a world of evil and long bitter wars. In such a world as that the little cup will look very lonely. But it may be in that age when man holds lightning in his hands, and rides the sky as Simon the Magician strove to do it will be needed more than it is needed now.

Factual errors: The bald eagle is not native to Italy.