"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.
I had a teacher in art school who said something about the only works he really enjoyed seeing or found much in were works where he had a sense that a discovery was made in the course of making this object. I like to hold to that as my marching orders.
