The University of the Philippines Diliman (UPD) is the main campus of the University of the Philippines System (UP System), the national university by virtue of Republic Act 9500.

UPD occupies 493 hectares of prime land in Quezon City, featuring an array of both old and new buildings housing the various disciplines that offer comprehensive education covering all facets of human behavior and development at the baccalaureate and postbaccalaureate levels. (obtained from https://upd.edu.ph/about/history/)

More details from https://upd.edu.ph/about/history/.