The Early Structure and Practice of Pre-Nicene Christianity: A Historical Overview

August, 2025

Journal of Pre-Nicene Christian Studies

Introduction

The essence of Christianity in practice, particularly in its earliest form, contrasts sharply with the monumental institutions and elaborate liturgies that emerged after the Nicene period. Pre-Nicene Christianity, particularly before the Council of Nicaea in 325 AD, was marked by simplicity and humility. Early Christian worship, sacraments, and community life were centered on the teachings of a single gospel, often conducted in private homes or house churches. This paper revisits the key components of Pre-Nicene Christian faith, which lay the groundwork for Christian liturgical practices, organizational structures, and theological beliefs, and evaluates how these early traditions were reinterpreted and preserved through later Christian movements, including the Marcionite Church.

The Singular Gospel and Early Christian Canon

Before the Nicene era and the subsequent canonical consolidation of Christianity, there was a single gospel — the “Gospel of the Lord,” as it was known among early Christians. This gospel was grounded in Paul’s revelation on the road to Damascus around 34 AD, and it did not resemble the later, more elaborate and divided texts such as the Gospels of Matthew, Mark, Luke, and John. Paul himself attested to the divine origin of this gospel in his letter to the Galatians, declaring that the gospel he preached was “not after man” but received through “the revelation of Jesus Christ” (Galatians 1:11–12). The simplicity of the early Christian canon stood in stark contrast to the multiple gospels and complex doctrines that would emerge in later centuries.

The gospel preached by early Christians described Jesus as descending to earth in human form during the 15th year of Tiberius Caesar, which corresponds to approximately 29 AD. This narrative emphasized the spiritual essence of Jesus’ mission — his teachings, death, and resurrection — not focusing on a birth narrative in Bethlehem, which became more prominent in later Christian traditions. The Bethlehem story, absent from the early Christian texts, was not included in the gospel or recognized as canonical by the Pre-Nicene Church.

The earliest version of this gospel, written in Koine Greek and preserved in the form of the Evangelion, serves as the foundation of the Marcionite Church’s beliefs. This original gospel would later undergo a series of modifications and adaptations to form the more widely recognized texts of the New Testament, starting with the canonical Gospels and culminating in the Judeo-Christian Bible of the fourth century. It was only after the establishment of Christianity as the state religion of the Roman Empire that the Christian scriptures became entangled with Jewish texts, resulting in the inclusion of the Old Testament and the deity Yahweh, which, for early Christians, was viewed as foreign and incompatible with the teachings of Jesus.

The Role of the House Church in Early Christian Worship

The early Christian community, particularly those adhering to the Pre-Nicene tradition, did not have access to the grand cathedrals or elaborate structures that became synonymous with Christianity after the Edict of Milan in 313 AD. Instead, worship occurred in private homes, often referred to as domus ecclesiae (house churches). These house churches were integral to the survival of the faith during periods of intense persecution, as they allowed Christian communities to maintain a low profile while still engaging in regular worship.

Full paper available as Open Access at https://journal.pre-nicene.org/

10.5281/zenodo.16789456