In 1435, Alberti had completed a first version in Latin of his tract On Painting: De Pictura. In or before July 1436 he had also done a translation and revision into Italian, dedicated to Filippo Brunelleschi. It is debatable whether it is this Italian adaptation or the ori­gi­nal Latin version that forms the basis of an an­oth­er revision, dating from the late 1530s. It is however on this third version, dedicated to Giovanfrancesco Gonzaga of Mantua, that the Latin edition of 1540, printed in Basle, is based.