Abstract
Diego de Deza was an important ecclesiastic in early 16th century Spain. Before being ordained bishop, he was the first Dominican to occupy the most important chair of theology in Salamanca, which would later be held by Francisco de Vitoria. As bishop he contributed in different ways to the spread of Thomism, especially with the refoundation of the Colegio de San Gregorio in Valladolid and the Colegio de Santo Tomás in Seville. Especially in his college of Seville he gave indications that indicated to follow Aquinas as a teacher not only for theology, but also for philosophy and the Bible. This article investigates this contribution by contrasting various unpublished manuscripts.