The University of the Philippines Diliman (UP Diliman, UPD, UPDil or informally as Peyups), is a coeducational and public research university located in Quezon City, Philippines. It is the flagship university, seat of administration and the fourth oldest constituent university of the University of the Philippines System. It also includes two extension program campuses in Pampanga and Olongapo City. The university was originally founded as American University of the Philippines in Padre Faura St., Manila on June 18, 1908. After the liberation from the United States, the school was renamed as University of the Philippines. In 1948, newly-established Republic of the Philippines sited an area now known as Quezon City as the nation's capital. The next year, the university acquired 493-hectare area on the Diliman district of the city. The new campus was named as University of the Philippines Diliman and was assigned to be the university's seat of administration and main campus.