fl. 1330s

Italian physician and inventor who became one of the first writers to include illustrations in a work on anatomy. In 1335, Guido presented Philip VI of France (r. 1328-50) with Texaurus regis Franciae, a guide both to health and military technology. Ten years later, he produced a medical manuscript that included depictions of human anatomy which by today's standards would be considered crude, but which were relatively detailed for their time. These drawings, from Guido's own hand, set a new standard for the use of illustrations to augment text in anatomical works, and proved a powerful force toward the reshaping of European studies in anatomy during the late medieval period.