Development of the New Testament canon a heretic and in the early 4th century Bishop Theodoretus of Cyrrhus and Bishop Rabbula of Edessa (both in Syria) rooted out all copies they could find of the Diatessaron and replaced them with the four canonical Gospels (M 215). As a result, no early copies of the Diatessaron survive—although a very early fragment suggests it would have been crucial evidence for the true state of the early Gospels (see IX). By the 5th century, the Syriac Bible, called the Peshitta, was formalized, accepting Philemon, along with James, 1 Peter and 1 John, but excluding 2 John, 3 John, 2
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