Chilean island in the S Pacific Ocean, part of the Polynesian group, about 3,500 km/2,200 mi W of Chile; area about 166 sq km/64 sq mi; population (1985) 2,000. It was first reached by Europeans on Easter Sunday 1722. On it stand huge carved statues and stone houses, the work of neolithic peoples of unknown origin. The chief centre is Hanga-Roa.