"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
The two major things that changed the makeup of all professional sports are money generated by television and courts that players went to in order to win their freedom as free agents.