Studies of ahu on Easter Island started more than a hundred years ago and a major scientific contribution was provided by the Norwegian Archaeological Expedition in 1955-56. The isolated location of Easter Island on the outskirts of the Polynesian realm and the numerous archaeological remains makes Its prehistory interesting to study, particularly aspects concerning origin and change.
"Variation and Meaning of Easter Island Ahu,"
Rapa Nui Journal: Journal of the Easter Island Foundation: Vol. 10
, Article 5.
Available at: https://kahualike.manoa.hawaii.edu/rnj/vol10/iss4/5