When Durio and his men are packing up the treasury, they handle gold bars with casual ease, and two men are able to pick up a chest filled with these gold bars without undue effort. Gold is extremely heavy at 1,206 pounds per cubic foot, so each chest would weigh well over a ton. Two men couldn't hope to lift one, the wagon could not support two dozen such chests, and two oxen couldn't pull it.
(at around 19 mins) An egg shell is visible stuck to a door. On the shell, a printed date code can be seen.
Octavia is asked for some poetry, and quotes the lines starting "Easy it is to descend into hell ...", a famous passage from Vergil's Aeneid. At this point Julius Caesar is still alive (therefore 44 BC at the latest). In fact the Aeneid was written at the end of Vergil's life, 30 to 19 BC, when Augustus (Octavian) was emperor.