Can I make a game with a era?

[TiTiTimmy]

As some leaders benefits more in the early eras with their special units, I was wondering if I can make the game go the classics or another era and not advance?

I can't remember if it has been in Civ 4 and have been left out, or if I'm just thinking about a different game.

 

[TiTiTimmy]

So there's no options without mods...too bad.