Theology · Updated August 15, 2026
Forming the Christian biblical canon was a lengthy and contentious process, taking over 300 years and involving debate and disagreement among early church leaders. Unlike the assumption that a single council or decree established the canon, the reality was a complex series of discussions and decisions that spanned centuries. Early Christians grappled with which texts were divinely inspired and should be included in their sacred scriptures, reflecting a diversity of thought and practice within the burgeoning church.
Numerous key moments and figures marked the journey to a defined canon. One of the earliest attempts to list New Testament books is the Muratorian Fragment, dating back to around 170 AD. However, this fragment included texts that are not part of today’s New Testament. The Council of Nicaea in 325 AD, often mistakenly believed to have settled the canon, actually focused on theological issues like the nature of Christ and the celebration of Easter. In 367 AD, Athanasius, the Bishop of Alexandria, took a step toward canonization by listing the 27 books of the New Testament in his Festal Letter. This list closely aligns with the New Testament as it is known today. Later, the Council of Carthage in 397 AD formally recognized the same set of texts, although acceptance was not immediate or universal. Throughout this period, many early Christian communities used different apocryphal books, such as the Gospel of Thomas
Today, the canon of Scripture varies slightly among Christian traditions, reflecting the historical disagreements and regional variations in early Christianity. The Catholic and Orthodox churches include several deuterocanonical books that are not found in the Protestant Bible. Despite these differences, the core books of the New Testament remain consistent across most Christian denominations, reflecting the foundational work of early church leaders. The canon as it stands today continues to be a central element of Christian faith and practice, influencing theology, worship, and personal devotion across the globe.
The process of forming the Christian biblical canon took over 300 years and involved significant debate and disagreement among early church leaders.
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