Peter I Island (Norwegian: Peter I Øy) is a volcanic island located near Antarctica. It was discovered by Fabian von Bellingshausen off West Antarctica on 21 January 1821. It takes its name after the Russian emperor Peter I (the Great). Ola Olstad made the first successful landing on 2 February 1929 and claimed the island for Norway. The other Antarctic territory claimed by Norway is Queen Maud Land. Peter I Island is the only Antarctic claim area under the Antarctic Treaty that is not a sector, and the only claim area in the otherwise unclaimed sector between 90°W and 150°W, just west of the Chilean Antarctic Claim.