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
Development of the Old Testament canon of the Catholic Church. All of these we also judge to be Canonical Books, and confess them to be Sacred Scripture. Not all books of the Old Testament are covered in the "Prophetologion", the official Old Testament lectionary: "Because the only exposure most Eastern Christians had to the Old Testament was from the readings during services, the Prophetologion can be called the Old Testament of the Byzantine Church." Development of the Old Testament canon The Old Testament is the first section of the two-part Christian Biblical canon; the second section is the New Testament. The Old Testament includes the books