The Rationes super Praedicamenta Aristotelis of John Pagus is one of the earliest known literary products of the Arts Faculty of the University of Paris. Written in the 1230s, it is among the first extant commentaries on Aristotle's Categories and reflects a period in which philosophers had already absorbed the full range of Aristotle's logical writings and were becoming increasingly familiar with his physical and metaphysical works.

The present volume contains the first full critical edition of the Latin text, preceded by an extensive introductory study consisting...