Natural History Division was retained under the Bureau of Science. The National Museum of the Philippine Islands would be established on December 7, 1928 through Act No. 3477. It was placed under the Department of Agriculture and Natural Resources. It was abolished in 1933 by Act No. 4007. The Division of Fine Arts was placed under the Philippine Library and Museum (now National Library of the Philippines) while the Division of Ethnology was placed under the Bureau of Science. The National Museum Division was created from the merger of the Division of Ethnology and the Natural History Division. The National Museum Division was renamed as the National History Museum Division with the Office of the Secretary of Agriculture and Commerce named as its parent agency via Commonwealth Act No. 453 in 1939. The Division was later merged to the National Library's Division of Fine Arts to become the National Museum under the Office of the Executive Secretary. World War II The Japanese occupation of the Philippines during World War II brought the Natural History Museum Division and the National Library's Fine Arts Division back under a single organization, but the museum lost a large part of its collection during the Liberation of Manila of 1945 when the Old Legislative Building and the Bureau of Science Building was destroyed. The organization which resulted from the divisions' merger was named as the National Museum and was placed under the Office of the Executive Secretary. The Legislative Building would be restored. Contemporary era The museum's role in cultural growth was recognized as contributing to government's desire for national development. In 1966, President Ferdinand Marcos signed Republic Act No. 4846 or the Cultural Properties and Protection Act. The law designated the museum as the lead agency in the protection and preservation of the nation's cultural properties through the conduct of census, study, and declaration of such properties and the monitoring and regulation of archaeological exploration, excavation, or diggings in historical or archaeological sites. With its new powers, it was able to strengthen its cultural mandate by declaring properties, structures, and sites of historical and cultural value to the nation. The educational mandate was strengthened because it was able to inform the public of the research it conducted and through the acquisition and exhibition of archaeological finds. In 2019, the powers of the National Museum were further expanded through Republic Act No. 11333 which was