Chulalongkorn University (CU; Thai: จฬ.; Thai: จุฬาลงกรณ์มหาวิทยาลัย, RTGS: Chulalongkon Mahawitthayalai) is a public autonomous research university in Bangkok, Thailand. The university was originally founded during King Chulalongkorn's reign as a school for training royal pages and civil servants in 1899 (B.E. 2442) at the Grand Palace. It was later established as a national university in 1917, making it the oldest institute of higher education in Thailand.
During the reign of Chulalongkorn's son, King Vajiravudh, the Royal Pages School became the Civil Service College of King Chulalongkorn. The Rockefeller Foundation was instrumental in helping the college form its academic foundation. On 26 March 1917, King Vajiravudh renamed the college "Chulalongkorn University".