Wikipedia
Te Maputeoa (baptized Gregorio Stanislas; reigned as Gregorio I; born c. 1814 – 20 June 1857) was a monarch of the Polynesian island of Mangareva and the other Gambier Islands. He was the King or ʻAkariki (paramount chief), as well as the penultimate king of the island of Mangareva, and other Gambier Islands including Akamaru, Aukena, Taravai and Temoe. He reigned from 1830 until his death in 1857.
During Maputeoa's reign, the country, which was deeply rooted in idolatry and even cannibalism, became a Roman Catholic community. This was accomplished by removing all vestiges of idolatry, such as destroying the traditional wooden images of their indigenous faith deified in maraes and replacing them with churches. The king was baptized into Catholicism on 25 August 1836. He learned about Christianity from the island's missionaries, headed by the French Picpus priests, Honoré Laval and François Caret. Matua, the High Priest of the local temple and uncle of Maputeoa, played a pivotal role in this activity.