"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 22nd amendment was passed in 1947 limiting the time for a presidential term, if issued before 1933 would have stopped F.D. Roosevelt from serving his famous 4 terms.