It achieved the title of Historic Artistic Site of National Interest on 10 April 1872. The monastery was founded by Alonso Pérez de Guzmán and his wife María Alonso de Coronel in 1301 as a tomb for their ashes and as evidence of their piety. It was built on the site of a Mozarab hermitage, which, according to tradition, was where San Isidoro was buried until he was moved to the Collegiate Church in Leon in 1063. The monastery was occupied by Hieronymite monks until Mendizábal's sale of church lands. All artistic styles are represented, Mudejar, the set is completed with the Cloister of the Dead and that of the Evangelists, the Sacristy and the Chapter House - both decorated in imitations of the Escorial - the refectory, Gothic Cloister, the Baroque Tower.