  There are various areas within the scholastic system of arts and sciences where a rich tradition of semiotic questions and answers accumulated over the centuries (Maierù 1981; Meier-Oeser 1997, 42–170; Fuchs 1999). Most important are those places located in the realm of the so-called trivium (i.e., grammar, rhetoric and logic), especially in logic where already the determination of its primary subject as well as the discussion of the basic logical notions (like ‘term’ or ‘signification’) gave rise to explicit remarks on the concept of sign. The most relevant loci classici of logical contributions to a general theory of sign and signification are: the comments on Aristotle's introductory chapter of On Interpretation (esp. 1. 16a3–8), “the common starting point for virtually all medieval theories of semantics” (Magee 1989, 8), as well as the commentaries (especially from the 15th and early 16th century) on the first tract of the so-called Summulae Logicales of Peter of Spain, and all texts or parts of logical textbooks that are related to one of the aforementioned passages. Further considerations with relevance to semiotics within the sphere of logic are to be found, though less frequently, in the commentaries on the final chapter of the Prior Analytics (2, 27 70a-b) where Aristotle had outlined his doctrine of inference from  signs.[1]  Still within the sphere of trivium, various efforts to develop grammar into a regular science matching the Aristotelian standards led, during the second half of 13th century, to approaches to language either starting from the general concept of sign (Bacon, Ps.-Kilwardby) or taking grammar as a theory reflecting on the fundamental structure of sign systems (grammatica speculativa).