§ 36.8. =Formation of a New Testament Canon.=--The oldest collection of a New Testament Canon known to us was made by the Gnostic _Marcion_ (§ 27, 11) about A.D. 150. Some twenty years later in the so-called _Muratorian Canon_, a fragment found by Muratori in the 18th century with a catalogue in corrupt Latin justifying the reception of the New Testament writings received in the Roman church. For later times the chief witnesses are Irenæus, Tertullian, Clement of Alexandria, Origen and Eusebius. The Muratorian Canon and Eusebius are witnesses for the fact that in the 2nd century, besides the Gospels, the Apostolic Epistles and the Revelation of John, other so-called Apostolic Epistles were read at worship in the churches, for instance, the _1st Ep. of Clement of Rome_, _the Ep. of Barnabas_, _the Shepherd of Hermas_, in some churches also the apocryphal _Apocalypse of Peter_ and _Acts of Paul_, in Corinth, an Ep. of the Roman bishop Soter (A.D. 166-174) to that church, and also _Acts of the Martyrs_. Montanist as well as Gnostic excesses gave occasion for the definite fixing of the New Testament Canon by the Catholic church (§ 40). Since the time of Irenæus, the four Gospels, the Acts, the 13 Epp. of Paul, the Ep. to the Hebrews (which some in the West did not regard as Pauline), 1st Peter, and 1st John, along with the Revelation of John, were universally acknowledged. Eusebius therefore calls these ὁμολογούμενα. There was still some uncertainty as to the Ep. of James, 2nd Peter, 2nd and 3rd John and Jude (ἀντιλεγόμενα). The antilegomena of a second class, which have no claim to canonicity, although in earlier times they were much used in churches just like the canonical scriptures, were called by him νόθα, viz. the Acts of Paul, the Shepherd of Hermas, the Apocalypse of Peter, the Ep. of Barnabas, and the Didache. He would also very willingly have included among these the Revelation of John (§ 33, 9), although he acknowledged that elsewhere that is included in the Homologoumena.--=The Old Testament Canon= was naturally regarded as already completed. But since the Old Testament had come to the Greek and Latin Church Teachers in the expanded form of the LXX., they had unhesitatingly assumed that its added books were quite as sacred and as fully inspired as those of the Hebrew Canon. Melito of Sardis, however, about A.D. 170, found it desirable to make a journey of research through Palestine in order to determine the limits of the Jewish Canon, and then to draw up a list of the Holy Scriptures of the Old Testament essentially corresponding therewith. Origen too informs us that the Jews, according to the number of letters in their alphabet acknowledged only 22 books, which, however, does not lead him to condemn this reception of the additional books of the church. From the end of the 2nd century, the Western church