"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.
If we are to change our world view, images have to change. The artist now has a very important job to do. He's not a little peripheral figure entertaining rich people, he's really needed.