Abstract: Despite eminent specialists deny that true architecture treatises were produced in the Middle Ages, Vitruve´s De Architectura Libri Decem, presented to emperor Augustus towards the year 25 B. C., can be considered a medieval document (end of the 8th century and beginning of the 99, since it was transcribed, as a manuscript, right in the Middle Ages. Besides this manuscript, two other medieval treatises are kept: De Diversis Artibus Schedula, written by a religious person under the pseudonym Monk Teophile, and a manuscript without title, known as Livre de Portraiture, by Wilars of Honecort. The first treatise refers to the arts subordinated to architecture (such as painting, metals and glassworks), and the second one refers to the selection and formation of apprentices in stonework, masonry and carpentry in the construction of gothic buildings. To sum up, these works pretended to make artisans of the highest technical level in the branch of architecture.