Development of the New Testament canon day called that of the sun" (Sunday) alongside the "writings of the prophets." A defined set of four gospels (the "Tetramorph") was asserted by Irenaeus, "c". 180, who refers to it directly. By the early 3rd century, Origen may have been using the same twenty-seven books as in the present New Testament canon, though there were still disputes over the acceptance of the Letter to the Hebrews, James, II Peter, II John, III John, Jude and Revelation, known as the Antilegomena. Likewise, the Muratorian fragment is evidence that, perhaps as early as 200, there existed a set of Christian writings
New Testament among Protestants when referring to those books found in the Christian Old Testament although not in the Jewish Bible, modern scholars began to refer to these works of early Christian literature not included in the New Testament as "apocryphal", by which was meant non-canonical. Collected editions of these works were then referred to as the "New Testament apocrypha". Typically excluded from such published collections are the following groups of works: The Apostolic Fathers, the 2nd-century Christian apologists, the Alexandrians, Tertullian, Methodius of Olympus, Novatian, Cyprian, martyrdoms, and the Desert Fathers. Almost all other Christian literature from the period, and sometimes