If you are going to make a bar like that (which is silly, because we don’t have time travel or Roman videos), I suppose that would make stick figure art, or any non-photo-realistic art, or any three year old’s art, also a lie.
If you are working in the genre of “historical art,” that is different from the genre of “religious art.”
Religious art portrays either a window to Heaven, as with Eastern icons, or a subjective feeling or vision or illustration of a religious event, such as a hagiographical or Biblical scene.
It is basically a physical version of a visualization, such as one might create when meditating on the Bible or the mysteries of the Rosary. The details will be symbolic or psychologically meaningful to the artist. The people might look like people the artist knows. The outfits will tend to be either fashions contemporary to the artist, or of a generic religious style (usually 3rd or 4th century AD in Western art, because that is when Christian art went big).
There is nothing wrong with using historical details as part of an artist’s piety. But that is not the point. The point is to depict a prayerful feeling about a situation, and to elicit prayer from the viewer - or even life changes.
