I also am confused where the "late antiquity" came from. I said we can add Muslims and all, but the late antiquity is too far from classic Roma. I enjoy the politics, workings, and cultural tones of classical early Empire. Tiberius and Octavian era, essentially. Though we can still keep the map, since we are doing a bit of an alternate universe. I'd say a good time period would be between 15 BC and AD 5.