The Acts of Saint Cyprian of Antioch consist of three principal texts—the Conversion, Confession, and Martyrdom—which were composed in Greek during the pagan revival of the latter half of the fourth century CE. Collectively they recount in first- and third-person narratives the life and deeds of a pagan magician in Antioch, his eventual conversion to Christianity, and his martyrdom under Diocletian. The legend concludes with the translation of Cyprian’s relics to the Caelian hill in Rome. This project focuses on the formation and development of this understudied hagiographical romance. It consists of two main parts: (1) a critical edition of the Greek texts of the Acts with commentary on the Greek manuscript tradition, the versional evidence, and their importance for late-antique history-of-religions research; (2) a commentary on the reception history of the Acts from late antiquity (Gregory of Nazianzus, Prudentius, Empress Eudocia, miscellaneous magical spells/prayers) through the Byzantine and medieval periods (Symeon Metaphrastes, the scholia of Basilius Minimus and Nicetas of Heraclea on Gregory’s Oration24, the Secreta Cipriani, etc.) with critical editions of the previously unedited resources.