Nowadays, the University of San Marcos has 20 faculties and 62 academic schools, being the only Peruvian university that offers studies in the main areas of knowledge (using the UNESCO criteria). San Marcos is considered as the main Peruvian university because its important participation during the history of Peru and its notable alumni and faculty. It is the only Peruvian university with a Nobel Prize winner, Mario Vargas Llosa, among its alumni.