The UP Diliman campus is the largest and most architecturally diverse among the constituent universities of the UP System. Spanning 493 hectares in Quezon City, it serves as the system's administrative and academic center, housing the Office of the UP President, the Office of the Chancellor, and the nation's leading research institutions. The campus reflects a rich architectural heritage, with structures ranging from neoclassical landmarks to modernist academic complexes and contemporary, sustainability-focused buildings. At its core is the Academic Oval, a tree-lined loop that defines the university's central academic and administrative district. Along this axis are Quezon Hall, the university's main administration building designed by Juan Nakpil; Gonzalez Hall, the University Library, also by Nakpil; and Benitez Hall and Malcolm Hall, two mirror-image neoclassical structures that house the College of Education and the College of Law, respectively. Other major colleges, including the College of Social Sciences and Philosophy, the College of Engineering, and the College of Science, are strategically located within or near the Oval. Beyond the Academic Oval, UP Diliman extends into distinct academic clusters, research hubs, residential zones, and open spaces, reflecting a well-planned balance between built and natural environments. To the east, the National Science Complex (NSC) and Engineering Complex house state-of-the-art STEM research facilities. The southern sector features cultural institutions, such as the
UP Film Institute, Jorge B. Vargas Museum, and Abelardo Hall, which serve as centers for artistic expression and historical preservation.
The Oblation and Academic Oval The U.P. Diliman campus is connected to Commonwealth Avenue via University Avenue. It stretches where traffic enters the campus or proceeds towards C.P. Garcia St., which connects Commonwealth Avenue to Katipunan Avenue. At the end of University Avenue, the
Oblation Plaza of the Diliman campus faces the road. Behind it, the facade of Quezon Hall can be seen. The
Oblation () is the most iconic figure of the U.P. System. The statue was originally created by National Artist Guillermo E. Tolentino in 1935 in a collective effort by the students of the U.P. System. The
Oblation was originally nude and made of concrete and stands in height. For morality and censorship purposes, U.P. President Jorge Bocobo suggested to put a fig leaf to cover the genitals. In 1950, the Board of Regents ordered the statue to be cast in true bronze. Tolentino made a trip to Italy to personally supervise the casting of his old masterpiece into bronze. The bronze statue, unveiled on November 29, 1958, is now housed at Gonzalez Hall where the University Library is also located. The main and largest road in the university is the Academic Oval, informally known as "Acad Oval". This road is composed of two joining avenues, the
Roxas and
Osmeña Avenues. Having a total circumference of about , the oval connects the rest of the colleges of the university from the main University Avenue. The avenue derives its name from several colleges located around it, namely the College of Media and Communication, College of Music, College of Engineering, College of Law, School of Economics, College of Business Administration, College of Education, College of Social Sciences and Philosophy and School of Library and Information Studies. The oval also covers Quezon Hall, the U.P. Theater, National Engineering Center, Student Activity Center/Vinzons Hall, Center for International Studies and Jorge B. Vargas Museum. Additionally, the Academic Oval is planted with over 500
acacia and fire trees.
Benitez Hall and Malcolm Hall Benitez Hall and Malcolm Hall, two of the oldest and most architecturally significant buildings on the UP Diliman campus, stand as mirror images of each other at the head of the Academic Oval. Designed by
Juan Marcos Arellano y de Guzmán, their construction began in 1939 and was completed between 1941 and 1949. Benitez Hall, home to the College of Education, is named after Francisco F. Benitez, the first dean of the School of Education. Its design features a balanced facade with a prominent pediment and pilastered entrance, reinforcing its function as a center of learning and teacher training. During World War II, the building was repurposed as a military quarters by Japanese forces, and it was reportedly the site of wartime atrocities, leading to persistent stories of paranormal activity within its halls. Standing directly across from it, Malcolm Hall houses the UP College of Law and is named after George Malcolm, a former Associate Justice of the Philippine Supreme Court and the founding dean of the College of Law. As a mirror image of Benitez Hall, Malcolm Hall exhibits the same neoclassical symmetry, with its tall Corinthian columns and arched windows.
Palma Hall and Melchor Hall Palma Hall, informally known as "AS" (Arts and Sciences), serves as the main building for the College of Social Sciences and Philosophy at UP Diliman. Designed by Cesar Homero Rosales Concio, the university's first campus architect, it was completed in 1951. The building is named after Rafael Palma, the fourth president of the university, who was a staunch advocate for academic freedom and liberalism. Palma Hall exemplifies the International Style of architecture, characterized by functional design and minimalist aesthetics. Concio incorporated Filipino architectural elements to enhance natural ventilation and lighting, making the structure well-adapted to the tropical climate. The asymmetrical layout and open-air corridors facilitate airflow and natural illumination, reflecting the modernist architectural trends of the era. The building is distinguished by its exposed concrete framework, horizontal louvers, and cantilevered balconies, all of which contribute to its practical and climate-responsive design.
Gonzalez Hall Gonzalez Hall, the University Main Library of UP Diliman, was designed by National Artist for Architecture Juan Nakpil and completed in 1950. Named after Bienvenido M. Gonzalez, the university's sixth president, the building was part of the post-war expansion that established UP Diliman as the seat of administration of the University of the Philippines system. The building embodies neoclassical architectural principles, characterized by its grand facade, symmetrical proportions, and columns. Inside, Gonzalez Hall serves as the central repository of academic and research materials, housing extensive collections, archives, and special publications. ===
Parish of the Holy Sacrifice === The Parish of the Holy Sacrifice, commonly known as the UP Chapel, is a Catholic chapel located on the UP Diliman campus. It was designed by Leandro V. Locsin, National Artist for Architecture, and completed in 1955. It is recognized for being the first circular church in the Philippines, with the altar placed at the center and the first structure in the country to feature a thin-shell concrete dome.The chapel contains works by multiple National Artists: Arturo Luz (floor mosaic), Vicente Manansala and Ang Kiukok (15 Stations of the Cross murals) and Napoleon Abueva (crucifix and altar). The design allows natural light to enhance the interior's serene and contemplative atmosphere. The National Historical Commission of the Philippines (NHCP) has declared it a National Historical Landmark, while the National Museum has recognized it as a Cultural Treasure.
Carillon and bell tower The only
carillon in the
Philippines and in
Southeast Asia that is manually played by a
clavier or a wooden keyboard, the
U.P. Carillon tower is about 130 feet tall. The U.P. Carillon was originally constructed in 1940 by
National Artist Juan Nakpil,
Conservatory of Music director Ramon Tapales and
UP President Bienvenido Gonzales with an initial idea of building a concrete structure that may tower the grounds of the university. Several years later, on August 1, 1952, the tower was finished and dedicated as the U.P. Carillon. Forty-eight bells with four
octaves were installed by the Dutch
carillonneur Adrian Antonisse, with the efforts laid by the U.P. Alumni Association. Apart from playing the U.P.'s anthem
UP Naming Mahal (U.P. Beloved), the carillon tuned many music such as the
Magtanim ay Di Biro (Planting Rice, a Filipino folk song) and
The Beatles sounds. During this time, U.P. students declared the university as a republic and as a separate entity from the Philippines. Due to age and rust, the carillon ceased to play in 1981. In 1988, the last symphonies of
U.P. Naming Mahal and
Push On U.P.! (U.P. Diliman's athletic cheer) from the tower was played during the December's Lantern Parade. Since then, the carillon was never tuned. After two years, the Project was able to collect ₱14 million which will be used to clean up and repair the tower itself and to replace the bells. In 2007, the carillon was formally reintroduced to the public after two years of restoration. The original 48 bells were put into archives and were replaced by 36 bells bought from Dutch company
Petit & Fritsen for ₱12 million, for which the construction engineers were provided by the Royal Bell Philippines. According to project engineer Matthew Bergers, each bell was made from 80% bronze and 20% an admixture of
zinc,
magnesium and
phosphorus. The largest of these bells weighs and the smallest . Gen. Antonio Luna Parade Grounds acquired its name
Sunken Garden due to its basin-shaped low-level formation that has the deepest point of 65 meters above sea level (contrary to the university's height that is over hundreds of meters above sea level). The Sunken Garden is the venue of the annual U.P. Fair as well as for sports tournaments, including
football,
frisbee and
volleyball. Sometimes, the Department of Military Science and Tactics hold training in the area. Another theory is that the depression was due to the emptying of former streams in the Sunken Garden that were prominent in the 1950s. These streams formerly run from Katipunan Avenue, going to the garden itself and leaves the campus for Commonwealth Avenue. These are used by students of the university including members of the
UP Fighting Maroons and is also rented for use to outsiders. ==Administration==