The Oregon Province Archives of the Society of Jesus first took form in 1912. The archive has the single greatest collection of extant material on Jesuit missionary activity in the Pacific Northwest between 1853 and 1960. In 1932 when the California Mission was split in two, the Oregon Mission assumed authority over the Alaskan and Rocky Mountain Mission. The historical papers of the Alaskan Mission are included within the Alaskan Mission Collection of the Oregon Province Archives.