“Dionysius.” A series of famous writings attributed to S. Dionysius the Areopagite (“Acts” xvii, 34), who was also popularly identified with the Martyr of Gaul, the first Bishop of Paris. The writings themselves form a collection of four treatises and ten letters. These will all be found in Migne, “Patres Graeci,” III. The treatises are generally referred to under their Latin names, “De Diuinis nominibus”; “Caelestis heirarchia”; “Ecclesiastica hierarchia”; “Theologia mystica.” The main source from which the Middle Ages obtained a knowledged of Dionysius and his doctrine was undoubtedly the Latin translation by Scotus Eriugena, made bout 858. There are ample commentaries by many great writers such as Hugh of Saint-Victor, Blessed Alburtus Magnus, S. Thomas, and Denys the Carthusian. The works of Dionysius the Aeropagite and the identification of this writer with S. Denys were accepts by Saints and Schoolmen, and perhaps we should do well to follow them without curious questions and impertinent discussion.