On 20 May 1293, King Sancho IV of Castile granted the Archbishop of Toledo, Gonzalo Pérez Gudiel, a Royal Charter to found a ' (as universities were known at that time), named "El Estudio de Escuelas Generales" in Alcalá de Henares. One of its alumni, Cardinal Cisneros, made extensive purchases of land and ordered the construction of many buildings, in what became the first university campus ex-novo in history: The "Civitas Dei", or "city of God", named after the work of Augustine of Hippo. On 13 April 1499, Cardinal Cisneros secured from Pope Alexander VI a Papal bull to expand "Complutense" into a full university. This Papal Bull conferred official recognition throughout Christendom to all degrees granted by the University. It also renamed the institution , after ', which was the Latin name of , where the University was originally located.