lutzj
The Last Thing You See
If you start a game at an age later than Anceint, when you found it, you get some free buildings and population points. I think this should pretty much be the default assumption, so that I don't have to waste all that time checking them and growing them from scratch when I found new cities in later eras.
It's already in there if you START in a later age. If you start in Ancient and go to Modern and build a city, it will just be a normal city. (I guess they decided important sites would be settled by then.) Also, conquered cities lose most of their buildings for balance and realism reasons.