Bolonia, Italia
Roger Bacon is one of the leading philosophers in medieval history of natural philosophy and, as has been recently discovered, also in medieval semiotics. A lost-part of his huge Opus maius, devoted to the study of signs, was discovered in a manuscript and published by Jan Pinborg and some of his colleagues. Recent studies on this treatise, called De signis, point out that Bacon’s semiotics was not an isolated theoretical effort, but had its roots in the preceding theological debates on sacraments. The semiotics of Roger Bacon is here presented in the context of the general lines of his thought.