The Colegio de San Juan de Letran, also referred to by its acronym CSJL, is a private Catholic coeducational basic and higher education institution owned and run by the friars of the Order of Preachers in Intramuros, Manila, Philippines. It was founded in 1620. Colegio de San Juan de Letran has the distinction of being the oldest college in the Philippines and the oldest secondary institution in Asia. The school has produced Philippine presidents, revolutionary heroes, poets, legislators, members of the clergy, jurists, and it is also one of the only Philippine schools that has produced several Catholic saints who lived and studied on its campus. The school's patron saint is St. John the Baptist. The campus contains two statues, representing the two foremost alumni in the fields of secular and religious service: former Philippine President Manuel L. Quezon and Vietnamese Saint Vicente Liem de la Paz.

Calamba, officially the City of Calamba, is a 1st class component city in the province of Laguna, Philippines. According to the 2020 census, it has a population of 539,671 people.