The University of Santo Tomas was founded on April 28, 1611. With the original campus located in Intramuros, the Walled City of Manila, UST was first called Colegio de Nuestra Señora del Santisimo Rosario, and later renamed Colegio de Santo Tomas, in memory of the foremost Dominican Theologian, St. Thomas Aquinas. On November 20, 1645, Pope Innocent X elevated the college to a university.