Roger Bacon's Theory of Signs

The subject of this thesis is Roger Bacon`s work De signis. Its goal is to consider in what sense Bacon works out the general theory of signs. In this sense the thesis` method is situated in the field of "archeology of sings". First it examines Bacon`s definition of sign as a relation, investigates its formal properties and ways of application in particular cases, i.e. Bacon`s classification of signs. Then it shows the way in which Bacon applies this general notion in particular examinations, that is in problems of what the words signify, concept of univaocation and equivocation, theory of analogy and last but not least it considers a question of the nature of signification itself. The last chapter is dedicated to the examination of the (re)imposition phenomenon together with consideration of result it has on the notion of sign relation`s nature and how it serves as an explanation of the process in which these relations work. Keywords: Roger Bacon, John Deely, Charles S. Peirce, medieval semiotics, archeology of signs