when did the eastern and western church split
East–West Schism A succession of ecclesiastical differences and theological disputes between the Greek East and Latin West pre-dated the formal rupture that occurred in 1054.[2][3][4] Prominent among these were the issues of the source of the Holy Spirit, whether leavened or unleavened bread should be used in the Eucharist,[a] the Bishop of Rome's claim to universal jurisdiction, and the place of the See of Constantinople in relation to the Pentarchy.[8]
Lindisfarne In 793, a Viking raid on Lindisfarne[37][d] caused much consternation throughout the Christian west and is now often taken as the beginning of the Viking Age. The D and E versions of the Anglo-Saxon Chronicle record:
New Testament Collections of related texts such as letters of the Apostle Paul (a major collection of which must have been made already by the early 2nd century)[3] and the Canonical Gospels of Matthew, Mark, Luke, and John (asserted by Irenaeus of Lyon in the late-2nd century as the Four Gospels) gradually were joined to other collections and single works in different combinations to form various Christian canons of Scripture. Over time, some disputed books, such as the Book of Revelation and the Minor Catholic (General) Epistles were introduced into canons in which they were originally absent. Other works earlier held to be Scripture, such as 1 Clement, the Shepherd of Hermas, and the Diatessaron, were excluded from the New Testament. The Old Testament canon is not completely uniform among all major Christian groups including Roman Catholics, Protestants, the Greek Orthodox Church, the Slavic Orthodox Churches, and the Armenian Orthodox Church. However, the twenty-seven-book canon of the New Testament, at least since Late Antiquity, has been almost universally recognized within Christianity (see Development of the New Testament canon).
Bible The Old Testament canon entered into Christian use in the Greek Septuagint translations and original books, and their differing lists of texts. In addition to the Septuagint, Christianity[vague] subsequently added various writings that would become the New Testament. Somewhat different lists of accepted works continued to develop in antiquity. In the 4th century a series of synods produced a list of texts equal to the 39, 46, 51, or 54-book canon of the Old Testament and to the 27-book canon of the New Testament that would be subsequently used to today, most notably the Synod of Hippo in 393 CE. Also c. 400, Jerome produced a definitive Latin edition of the Bible (see Vulgate), the canon of which, at the insistence of the Pope, was in accord with the earlier Synods. With the benefit of hindsight it can be said that this process effectively set the New Testament canon, although there are examples of other canonical lists in use after this time.