Factual error: In the scene where Marcellus is being shipped off to "Palestine" on the galley - presumably from Ostia the port of Rome at the mouth of the Tiber - he is urged to hurry up his farewell to Diana by the galley captain because "we will miss the tide." This is the Mediterranean - there is no tide to speak of.
Continuity mistake: Jesus's garment appears to shrink during this movie. It covers him at one stage, but ends up small enough to drape over Richard Burton's shoulders.
