The 2011 film version of Shakespeare’s Coriolanus [http://www.imdb.com/title/tt1372686/] is, as a title card puts it, set in “a place calling itself Rome” — not in historical Rome nor Shakespeare’s idea of Rome, but a modern country with aspects of both.
Unlike historical Rome, this “place” has a flag, which is seen in momentary glimpses here and there, just as any national flag is likely to be seen in any war movie. I was annoyed that the flag never appeared clearly anywhere in the film, although I was able to screencap some interesting images. The decidedly non-historical interpretation of the Roman eagle which appears on the flag is also seen on a wall in one scene, and from that shot I was able to reconstruct a version of their “Roman flag”.
The barbarian tribe of the Volsciani also have a flag in this film, and an interesting one, and various flags are also seen in protest marches during the film.
When my parents saw the film Beastmaster [http://www.rottentomatoes.com/m/beastmaster/] they urged us to see it also. The film itself was awful, they told us, both as a film and as an adaptation of Andre Norton’s novel, but they promised us it had “great eagle footage”. Ever since, my wife and I have referred to a redeeming feature of something substandard as “great tomato footage”, “great eraser footage”, &c. In the case of Coriolanus, though, the flag footage is the least of the things that I found enjoyable. I liked it a lot.