There is, sort of a freeplay mode, but its a bit shabby. Try to win as early as possible, and then unite greece. Exit the game to go back in to the profile you were playing as. You'll get one turn of freeplay, then at the next turn, unite greece again. Repeat this pattern. It'll only work 'til turn 161. Also, how many times you press unite greece is one victory, so it can be a good way to farm civilisation points.
 "Pre-Civilization Marble Age"){kind=icon}