This sharper focus allows Anno Domini to model things that would normally be outside the scope of a Civ game, including new Historical Moments and new government types. It basically takes Civ 6’s gameplay and zooms way in on the Ancient and Classical eras 'from the Dawn of Time to the fall of Rome,' keeping the same game pace and roughly the same number of civics and technologies to unlock.
This is one of the most involved mods I’ve ever seen.