If it is true that semiotics has tried to establish itself as an autonomous science starting with Saussure and Peirce, in imposing itself as a cultural fashion since the 1960’s, due especially to Roland Barthes and his interest in the language of connotations, it is also true that from ancient treatises of medicine to books of magic, from rhetoric to logic, from nature to science, symbols— even from different points of view—have been the object of passionate reflections.