November 16 marked the 400th anniversary of the death, in Toulouse, of Francisco Sánchez de Sousa, known as "the Skeptic" or "the Tudense" who was, without a doubt, the most prestigious doctor and philosopher in the history of Galicia. With a versatile, multifaceted and cosmopolitan spirit, he represents the living incarnation of the Renaissance prototype of universal man.From a medical point of view, it could be said that our protagonist was a precursor of Evidence-Based Medicine, since he advocated a direct examination of things and submitting the data from the experience to analysis and critical judgment.The medical work of Francisco Sánchez is collected in a very heterogeneous conglomerate, published posthumously under the generic title of Opera Medica. It consists of a compilation of philosophical texts and a collection of various medical writings that includes notes, monographs, conferences, speeches and even notes for teaching.