The University of the Philippines Diliman (also referred to as UPD or UP Diliman) is a coeducational, research state university located in Diliman, Quezon City, Philippines. It was established on February 12, 1949 as the flagship campus and seat of administration of the University of the Philippines System, the national university of the Philippines. UP Diliman is the fourth oldest constituent university of UP. UP Diliman was formally established as a constituent university on April 23, 1985 at the 976th Meeting of the U.P. Board of Regents.