Early Christian genres called in antiquity “passions” and “martyrias” or “acts” had no clear genre boundaries. Neither literary frameworks were established, nor fidelity to generic canon was much important to Christians who wrote about martyrdom. They often wrote epistles because they wanted to tell their fellow believers about the deeds of the martyrs, often relied on authentic records of trials and eyewitness accounts, often praised the passion-bearers, and used martyrologies as liturgical texts. Martyrology gradually developed into hagiography with its subgenres. But even against this background, the “Passion of Perpetua and Felicitas” demonstrates exclusively elusive generic nature. The traditional title “Passio” corresponds to the content of the text under discussion. However, the work is made up of many parts written by different authors, not simultaneously, and combined into a single book. At least five persons were involved in the compilation of this set of documents (the communis opinio – three persons). These five had different statuses and different tasks. Theologue and author of the Prologue and Epilogue preached and glorified the martyrs, Perpetua created extragenre commentaria or hypomnemata for her congregation about the events of the prison, mainly about her dreamy visions given to her by the Holy Spirit: a heavenly journey, two journeys to the underworld, and a symbolic dream of the coming martyrdom as a victory over the devil. The Vision of Saturus has apocalyptic features, but what he saw he saw as if already beyond his earthly life; the Eyewitness created an account of what happened in the prison and in the arena, very vivid, but not fulfilling the minimum conditions of acts and martyrdoms: interrogation, sentence, burial, cult. The fifth author brought all the texts together and provided explanatory inserts, thus turning the whole functionally into an epistle that could be sent from Carthage to the larger world to be read in the Church. The result is a genre to which there are no analogues in ancient literature, and attempts to define this book through the genres of ancient literature both as a whole and in parts are unsuccessful. However, the genre of the documentary book, written by different authors at different times, in different genres, including apocalyptic, acts and passions, sermons, epistles, and visions, had emerged by the time of our Passio as the whole collection of the New Testament, with all the disparate texts, though independent, all dealing with one great event: the life, death, and resurrection of Christ and the establishment of his church. It served as a model for the compilation of the “Passion of Perpetua and Felicitas”.