North Solomon Islands between Bougainville (an autonomous region of Papua New Guinea) and the sovereign state of Solomon Islands, which is the successor state to the British Solomon Islands Protectorate renamed in 1975 prior to achieving independence in 1976. On 17 February 1568, the archipelago was discovered by Spanish explorer Alvaro de Mendaña y Neyra, who named its "Islas de Salomon". In April 1885 a German protectorate ("Schutzgebiet") was declared over the northern Solomon Islands: Bougainville, Buka, Choiseul, Santa Isabel and Ontong Java. In 1893 the British declared a protectorate over the southern Solomon Islands of New Georgia, Guadalcanal, Malaita and San Cristobal,
Choiseul Island under both protectorates, converting most of the population to Christianity. In the early 20th century several British and Australian firms began large-scale coconut planting. Choiseul was visited by Austrian anthropologist and photographer Hugo Bernatzik in 1932. Bernatzik documented some of the few remaining ancestral customs of the island people which are included in an ethnography that he published a few years later. He also took some photographs of the islanders and brought back a stone urn with carvings, reflecting a culture that he deemed was dying in contact with the modern world. During World War II, the Choiseul was occupied