The Pseudo-Clementines exist in two versions, the Greek Homilies and the Latin Recognitiones, both of which refer back to a common source usually called Grundschrift G. One explanation, going back to J. Hilgenfeld 1848, is that the Recognitiones and Homilies are the independent creations of different authors with differing objectives, both departing from a source that is the work of one author G, with the Recognitiones seeming to be closer to the original. Others see G as a Jewish Christian work, written in Syria in the 3rd c. and composed of various sources: 1 the account of the recognition; 2 missionary sermons of Peter, or rather Kerygmata Petrou; 3 accounts of Peter’s meetings with Simon; 4 Peter’s dialogues with Apion; 5 a history of God’s people from Abraham to the earliest days of the church, the work of an anti-Pauline Jewish Christian from ca. 200, taken up by Rec. I, 27-71, but identified with the Ascension of James, known by Epiphanius. This latter work, from the 2nd half of the 2nd c. and the source of Rec. I, 33-71, attempts to discern a true path between two false ones. G, the work of a sectarian Jewish Christian, would have been written in Celesyria in the mid-3rd c. Its first elaboration, that of the Homilies, would correspond to the early 4th c., before Nicaea. That of the Recognitiones, more autonomous from G, could be the work of a Catholic interpolated in his trinitarian doctrine by a Eunomian of Celesyria or Palestine, ca. 350.