Formation of the Biblical Canon

The Muratorian fragment, an early list of New Testament books

Formation of the Biblical Canon is the historical process by which the Church discerned and authoritatively received the books of the Old and New Testaments.

Authority level: Dogma

Discernment in the Church

The canon was not delivered as a table of contents alongside the apostolic writings. Israel's Scriptures were received in several textual and linguistic forms, while Christian communities distinguished apostolic books used in worship from useful, disputed, or spurious writings over the first centuries.

Criteria visible in this reception include apostolic origin or connection, coherence with the rule of faith, and widespread liturgical use. These are historical descriptions of ecclesial discernment, not independent tests by which later readers can reconstruct a different canon at will.

Catholic definition

Regional councils at Hippo and Carthage witnessed the collection later named at Florence and solemnly enumerated by Trent. Trent's decree settled for Catholics the disputed canonical status of the deuterocanonical books and received the books with all their parts as used in the Church.

The formation of the biblical canon is distinct from the canonical list treated under Biblical Canon.

Old Testament reception

The Old Testament was received through the Scriptures of Israel in Hebrew, Aramaic, and Greek forms. Ancient Jewish and Christian evidence does not yield one uncomplicated list or one uniform practice in every place. Catholic accounts should therefore distinguish the history of texts, the history of lists, and the Church's eventual authoritative reception.

The books later called deuterocanonical were read and disputed in different ways. Their status cannot be explained merely by saying that they were added at Trent, nor by treating every early citation as a formal canonical definition. The historical question concerns a long process of worship, teaching, copying, translation, and discernment.

New Testament reception

The four Gospels, Acts, apostolic letters, and Revelation were received amid a wider Christian literature that included homilies, letters, apocalypses, and accounts of apostolic figures. The Church did not create the authority of apostolic witness; it recognized and guarded the books received as inspired Scripture.

By the fourth century, lists and councils gave public witness to the twenty-seven-book New Testament used by Catholics today. Later definitions provided certainty in disputed settings. This history explains why canon, Tradition, and the Church's teaching office are inseparable in Catholic theology.