The World’s first open-air museum established in 1881, King Oscar’s Collection, was incorporated in 1907. Thus Gol Stave Church and five other buildings were added to Norsk Folkemuseum. An ambitious plan for further expansion was successfully completed in 1934, adding new exhibit and storage area. The museum played a central role as a research institution and issued its own publications. During the 1950s and -60s this trend continued, and the research branched out to include many academic fields.