The Diocese of Bougainville comprises the whole of the Autonomous Region of Bougainville - AROB (Islands of Bougainville, Buka, Nissan and Carterets). The first missionaries landed in Kieta in 1901. The Northern Solomons became a Prefecture Apostolic 21 January 1904; Vicariate of the North Solomons on 31 May 1930, and Diocese of Bougainville on 15 November 1966.