<Li> Moai on squareish "pedestals" looking inland, the ramp with the poro before them . </Li> <Li> Pukao or Hau Hiti Rau on the moai heads (platforms built after 1300). </Li> <Li> When a ceremony took place, "eyes" were placed on the statues . The whites of the eyes were made of coral, the iris was made of obsidian or red scoria . </Li> <P> Ahu evolved from the traditional Polynesian marae . In this context ahu referred to a small structure sometimes covered with a thatched roof where sacred objects, including statues, were stored . The ahu were usually adjacent to the marae or main central court where ceremonies took place, though on Easter Island ahu and moai evolved to much greater size . There the marae is the unpaved plaza before the ahu . The biggest ahu is 220 metres (720 ft) and holds 15 statues, some of which are 9 metres (30 ft) high . The filling of an ahu was sourced locally (apart from broken, old moai, fragments of which have been used in the fill). Individual stones are mostly far smaller than the moai, so less work was needed to transport the raw material, but artificially levelling the terrain for the plaza and filling the ahu was laborious . </P>

Where are the statues located on the easter island