This chapter begins with a description of the first biography of the Antichrist by Adso of Montier-en-Der around the year 950. It then traces the development of the story within the New Testament, particularly the book of Revelation, the letters of John, and the second letter to the Thessalonians. It looks at the developing Antichrist tradition in early Christian literature, especially the Didache, the Apocalypse of Peter, the Dialogue with Trypho, the Epistle of Barnabas, and the Testament of Hezekiah. It shows how, by the end of the second century, all the elements that were to become central features of the story of the Antichrist were in place.