Revealing mistake: When Caesar's ship arrives in the Alexandria marketplace, he tells his men to "go marketing" rather than force their way through the crowd with swords. Rufio says "you're not serious?" He then silently mouths along with Caesar's reply, "We shall shop our way to the palace steps." (00:11:30)
Revealing mistake: Cleopatra rides a sphinx during her spectacular introductory parade in Rome. Just as the Sphinx is about to pass through the Roman arch, sunlight casts shadows of the open girder lattice behind the Arch's facade.
Answer: The people of higher rank would usually have more or better armor so in his case that would probably be extra armor for his legs and arms.