Abstract
The article aims to analyze the meaning and the role of the notion of communis schola in the theological and ecclesiological thought of Jean Gerson (1363-1429), Chancellor of the University of Paris, schoolman influent in every intellectual debate of his time, and renowned spiritual advisor. Driven by a constant concern for the unity of the Church, Gerson is aware of the need to realize this unity first of all within the University environment, in order to avoid the circulation and the spread of heterodox or even heretical doctrines; his references to the concept of "common school", in different textual contexts and with various shades of meaning, invest not only the doctrinal contents, but also the methodology, the moral attitudes, and the right theological models of the ideal master and of the ideal student of theology.
The article also touches the way in which the Parisian chancellor deals with mysticism and mystical writers, using the concept of "common school" to define the borders and the terms in which it is possible to access the difficult and obscure field of the mystical theology.