Dionysius is the author of three long treatises (The Divine Names, The Celestial Hierarchy, and The Ecclesiastical Hierarchy) one short treatise (The Mystical Theology) and ten letters expounding various aspects of Christian Philosophy from a mystical and Neoplatonic perspective. Presenting himself as Dionysius the Areopagite, the disciple of Paul mentioned in Acts 17:34, his writings had the status of apostolic authority until the 19th century when studies had shown the writings denoted a marked influence from the Athenian Neoplatonic school of Proclus and thus were probably written ca. 500.
Although the attribution of authorship has proven to be a falsification, the unknown author (hereafter referred to as Ps-Dionysius) has not lost his credibility as an articulate Athenian Neoplatonist expressing an authentic Christian mystical tradition. Indeed with eloquent poetic language and strong exposition of ideas, the Dionysian corpus ranks among the classics of western spirituality.