Continuity mistake: When Lucius descends the stairs to greet his mother and Commodus, there is a brief close-up sideways which shows, behind them, a banner, and two stones with hieroglyphs. There are in fact several Egyptian obelisks in Rome, that were taken there in antiquity. The only trouble is, it doesn't match with the long shot at all. (Commentary track confirms this was not shot on one existing location - only the four top steps of the stairs were really there). (00:57:31)
Spiny Norman
1st Sep 2020