Best historical mod for RTW?

[MARCVS PETRONIVS MAIVS]

A decent mod for the later roman empire would be great.

Do you have the expansion pack Barbarian Invasion? This very well covers the later Roman period. Or do you mean the period before Constantine the Great?

I have BI, but its just as accurate (or should I say innacurate) as RTW. Anything from 200AD onwards would do.