When Did Christianity Start?

In This Series (11)

Christianity has no single start date. Scholars who study the origins of the movement identify not one founding moment but a series of developments — stretched across roughly a century — through which a Jewish sect in Roman Judea gradually became a distinct religion.

The crucifixion of Jesus around 30 CE, Paul’s earliest letters in the 50s CE, the Roman destruction of the Second Temple in 70 CE, and the progressive separation of Christian and Jewish communities through the second century all function as possible starting points. Each emphasizes a different aspect of what “starting” means.

The question “when did Christianity start?” is really a question about what you consider definitive: a person, a text, an event, or a process.

~30 CE: The Crucifixion and Its Aftermath

The most common answer to “when did Christianity start?” points to the crucifixion and reported resurrection of Jesus of Nazareth, dated by most scholars to approximately 30 CE (a minority argue for 33 CE). Jesus was executed by crucifixion under the Roman prefect Pontius Pilate in Jerusalem, during or near the Jewish festival of Passover.

The crucifixion itself, however, did not create Christianity.

Crucifixion was a Roman method of executing political criminals and enslaved people; thousands were crucified in first-century Palestine. What made this execution different was what happened afterward — or, more precisely, what Jesus’s followers claimed happened afterward.

Within a short period following the crucifixion, Jesus’s followers began proclaiming that God had raised him from the dead.

This proclamation — not the crucifixion itself — was the catalyst. Paul, writing to the Corinthians around 53-54 CE, preserves what many scholars consider the earliest formulation of this claim: “that Christ died for our sins in accordance with the scriptures, and that he was buried, and that he was raised on the third day in accordance with the scriptures” (1 Corinthians 15:3-4). Paul identifies this as a tradition he himself received, suggesting it circulated in the movement before he joined it in the mid-30s CE.

Whether one locates the “start” of Christianity in the crucifixion, the resurrection claim, or the formation of the community that carried that claim forward depends on how one defines the beginning of a religious movement. The event itself? The interpretation of the event? Or the community that organized around that interpretation?

~33-49 CE: The Silent Decades

Between the crucifixion (~30 CE) and the earliest surviving Christian document (~49-51 CE), there is a gap of roughly two decades for which scholars have no contemporary written sources.

This period — sometimes called “the tunnel period” by historians of early Christianity — must be reconstructed from later evidence: Paul’s letters (which reference earlier traditions), the Book of Acts (composed decades later, around 80-85 CE), and inferences from the texts that eventually emerged.

What scholars can reconstruct suggests rapid development. During these two decades, the Jesus movement:

Established a community in Jerusalem led by James (Jesus’s brother), Peter, and John
Began attracting Gentile (non-Jewish) sympathizers alongside its Jewish core
Developed early christological claims about Jesus’s identity and significance
Experienced internal debates about whether Gentile converts needed to follow Jewish law
Expanded beyond Palestine into the Jewish diaspora communities of the eastern Mediterranean

Larry Hurtado, in Lord Jesus Christ (2003), argued that the devotional practice of worshipping Jesus alongside God — what he called a “mutation” within Jewish monotheism — emerged within the first two decades after the crucifixion, far earlier than many scholars had assumed.

If Hurtado is right, the seed of what would become a distinct religion was already present in the 30s and 40s CE, embedded in the worship practices of Jewish followers of Jesus.

But a seed is not a tree. During these decades, the Jesus movement’s participants understood themselves as Jews — a group within the diverse landscape of Second Temple Judaism, not a separate religion.

~49-62 CE: Paul’s Letters — The First Written Evidence

The oldest surviving Christian documents are the letters of Paul of Tarsus, composed during his travels across the eastern Mediterranean. His earliest letter, 1 Thessalonians, is dated by most scholars to approximately 49-51 CE. His last undisputed letter, Romans, was likely composed around 55-58 CE.

These seven undisputed letters — 1 Thessalonians, Galatians, 1 Corinthians, 2 Corinthians, Romans, Philemon, and Philippians — represent the first written evidence of Christian theology, community organization, and internal debate. For a detailed timeline of all New Testament texts, the composition dates of Paul’s letters through the latest New Testament writings span roughly 50 to 120 CE.

Paul’s letters are significant as a dating marker because they reveal what the movement looked like roughly twenty years after Jesus’s death.

Several features stand out.

Paul makes almost no reference to Jesus’s earthly life. There is no mention of the virgin birth, the Sermon on the Mount, the parables, or the miracles described in the later Gospels. Paul’s Christ is a crucified and risen figure whose pre-crucifixion life receives virtually no narrative attention. The absence is striking — not because Paul was unaware of Jesus’s life, but because it suggests that the narrative traditions later preserved in the Gospels had not yet become central to the movement’s self-understanding.

Paul’s communities were already debating fundamental questions about identity and boundaries. Should Gentile converts be circumcised? Could Jewish and Gentile believers share meals? What happened to believers who died before Christ’s expected return?

These were not abstract theological exercises. They were the lived questions of communities trying to define themselves in real time — communities that did not yet have Gospels, creeds, or institutional hierarchies to guide them.

If “when did Christianity start?” means “when do we first have written evidence of a movement that would become Christianity,” the answer is the early 50s CE.

70 CE: The Destruction That Changed Everything

The Roman destruction of the Second Temple in Jerusalem in 70 CE was a catastrophe for Judaism and a turning point for the Jesus movement.

For nearly six centuries, the Temple had been the center of Jewish religious life — the place where sacrifices were offered, where priests mediated between God and Israel, and where Jews from across the diaspora gathered for pilgrimage festivals. When the Roman general Titus conquered Jerusalem and razed the Temple, the entire sacrificial system ended.

It has never been restored.

The destruction reshaped both movements that emerged from Second Temple Judaism. Rabbinic Judaism, developing over the following centuries, reorganized Jewish life around Torah study, prayer, and communal practice — replacing the Temple sacrifice system with practices that could be maintained anywhere.

The Jesus movement, already developing an identity independent of the Temple through Paul’s theology, found in the destruction a powerful vindication of its message. The Gospel of Mark, likely composed around the time of the destruction, includes Jesus predicting the Temple’s fall (Mark 13:2) — a passage that scholars debate as either genuine prophecy or a reflection composed after the event.

After 70 CE, the Jesus movement’s Jewish character began to attenuate. The Jerusalem community — the most traditionally Jewish wing of the movement — had lost its institutional center. The communities that now carried the movement forward were predominantly in Gentile-majority cities: Antioch, Ephesus, Corinth, Rome.

The Gospels of Matthew and Luke, both composed around 80-85 CE, reflect communities already negotiating what it meant to be a movement that had emerged from Judaism but was increasingly composed of people who were not Jewish.

The destruction of the Temple did not create the separation between Judaism and Christianity by itself. But it removed the institution around which both movements might have continued to coexist.

~80-150 CE: The Gradual Parting of Ways

Scholars once described the separation of Christianity from Judaism as a clean break — a single moment when one religion split into two.

Current scholarship tells a more complex story.

Daniel Boyarin, in Border Lines: The Partition of Judaeo-Christianity (2004), argued that Judaism and Christianity did not separate neatly but rather emerged as distinct religions through a prolonged process of mutual boundary-drawing that continued into the fourth century CE. Boyarin described the relationship not as a mother giving birth to a daughter religion but as twins developing in the same womb — “contending with each other for identity and precedence, but sharing with each other the same spiritual food.”

The textual evidence supports this picture of gradual separation:

The Gospel of Matthew (~80-85 CE) shows a community still deeply engaged with Judaism, arguing about the proper interpretation of Torah rather than rejecting it. Matthew’s Jesus says, “Do not think that I have come to abolish the law or the prophets; I have come not to abolish but to fulfill” (Matthew 5:17).

The Gospel of John (~90-100 CE) reflects a sharper break. John’s repeated references to “the Jews” as opponents — a category that would have made little sense to the Jewish followers of a Jewish teacher — suggest a community that has experienced formal exclusion from the synagogue.

The Didache (~50-120 CE, dating uncertain), a manual of church practice, prescribes fasting on Wednesdays and Fridays specifically to differentiate from “the hypocrites” who fast on Mondays and Thursdays — most likely a reference to Jewish fasting practices. The need to differentiate implies ongoing proximity.

By the mid-second century, Christian writers like Justin Martyr (~150 CE) were articulating a vision of Christianity as something distinct from and superior to Judaism. But even Justin’s Dialogue with Trypho reveals a world in which the boundary was still being argued rather than simply assumed.

The “start” of Christianity as a religion distinct from Judaism was not a moment. It was a process that took generations.

Dating Christianity: A Timeline

The following timeline maps the key stages of Christianity’s emergence — not a single founding date, but a gradual development from a Jewish movement to a distinct religion.

Date	Development
~30 CE	Crucifixion and reported resurrection of Jesus
~33-49 CE	The “tunnel period” — earliest community formation, no surviving documents
~49-51 CE	1 Thessalonians composed — the oldest surviving Christian text
~50-62 CE	Paul’s undisputed letters composed across the eastern Mediterranean
~65-70 CE	The Gospel of Mark composed — the earliest narrative account of Jesus
70 CE	Roman destruction of the Second Temple in Jerusalem
~80-85 CE	Gospels of Matthew and Luke composed
~90-100 CE	Gospel of John composed — reflects sharper separation from Judaism
~100-120 CE	2 Peter composed — the latest New Testament text
~150 CE	Justin Martyr articulates Christianity as distinct from Judaism

Why There Is No Single Answer

The question “when did Christianity start?” assumes that a religion begins at a single identifiable moment — the way a company is incorporated or a nation declares independence.

Religions rarely work that way.

Christianity emerged through a layered process. A Jewish preacher was executed. His followers interpreted that execution as an event of cosmic significance. One of those followers, Paul, developed a theological framework that opened the movement to the non-Jewish world. A catastrophic military defeat destroyed the institution — the Temple — around which the movement’s Jewish participants might have maintained their original identity. Texts were composed that increasingly addressed non-Jewish audiences. Boundaries between the movement and the synagogue communities from which it had emerged hardened over decades and centuries.

E.P. Sanders, whose Paul and Palestinian Judaism (1977) reshaped scholarly understanding of the relationship between early Christianity and Judaism, emphasized that the Jesus movement must be understood as emerging from within Judaism, not as arriving from outside it.

The separation was a process of differentiation within a shared tradition — more like cell division than like emigration.

If you want to trace this emergence through the texts themselves — reading Paul’s earliest letters alongside the later Gospels, watching the movement’s self-understanding develop in real time — Uncanon arranges every biblical passage by composition date with scholarly context about who composed each text, when, and why. The chronological approach makes visible what canonical order obscures: that Christianity did not arrive fully formed but developed through decades of writing, arguing, and community-building.

Experience This Yourself

Uncanon presents the Bible in composition order with scholarly context before every passage — Setting the Scene, What Scholars Say, and Things to Notice — plus an AI guide you can ask questions at any point.

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Frequently Asked Questions

When did Christianity start?

Christianity has no single start date. Scholars identify several key moments across a century-long emergence: the crucifixion and reported resurrection of Jesus (~30 CE), Paul's earliest letters (~49-51 CE) which are the first surviving Christian documents, the destruction of the Second Temple in 70 CE which accelerated the separation from Judaism, and the gradual 'parting of the ways' between Jewish and Christian communities that continued into the second and third centuries. Most scholars place Christianity's origins in the first century CE but its emergence as a clearly distinct religion in the second century or later.

How old is Christianity?

Christianity is approximately 2,000 years old, depending on which starting point you use. If you date from the crucifixion of Jesus (~30 CE), it is roughly 1,996 years old. If you date from the earliest surviving Christian documents — Paul's letters (~49-51 CE) — it is roughly 1,977 years old. If you date from the point at which most scholars consider Christianity clearly distinct from Judaism (mid-second century CE), it is roughly 1,876 years old.

What year was Christianity founded?

No single year can be identified as Christianity's founding date. The crucifixion of Jesus is typically dated to approximately 30 CE (some scholars argue for 33 CE). Paul's first letter, 1 Thessalonians, was composed around 49-51 CE. The destruction of the Jerusalem Temple in 70 CE accelerated the movement's separation from Judaism. The Gospels were composed between approximately 65 and 100 CE. Each of these dates marks a significant stage in Christianity's emergence rather than a founding moment.

Was Christianity the first religion?

Christianity was not the first religion. Judaism, from which Christianity emerged, has roots reaching back to the second millennium BCE, with the earliest biblical texts dating to approximately 750 BCE. Hinduism's oldest texts (the Rigveda) date to roughly 1500-1200 BCE. Zoroastrianism may date to the second millennium BCE. Egyptian and Mesopotamian religious traditions are far older still, extending back thousands of years before Christianity's first-century origins.

What is the oldest Christian text?

The oldest surviving Christian text is Paul's first letter to the Thessalonians (1 Thessalonians), composed around 49-51 CE — roughly two decades after the crucifixion of Jesus. It predates every Gospel by at least 15 years. Paul's seven undisputed letters, all composed between approximately 50 and 62 CE, are the earliest surviving evidence of Christian theology, community structure, and internal debate. For more on the dating of all New Testament texts, see the full New Testament timeline.

Did Christianity start with Jesus or Paul?

Both, in different senses. Jesus of Nazareth originated the movement through his teaching and the community that formed around him in the late 20s CE, but he operated within Judaism and did not establish a separate religion. Paul of Tarsus, writing in the 50s CE, developed the theological framework that distinguished the movement from Judaism — particularly the argument that Gentiles could join without adopting Jewish law. Some scholars describe Jesus as the movement's origin and Paul as its architect, while others point to the destruction of the Temple in 70 CE as the event that made separation from Judaism irreversible.

When did Christianity split from Judaism?

The separation was gradual, not a single event. Scholars describe a 'parting of the ways' that unfolded over roughly one to three centuries. Key stages include Paul's Gentile mission (50s CE), the destruction of the Temple (70 CE), the composition of texts reflecting Jewish-Christian tensions (the Gospel of John, ~90-100 CE), and the development of distinct Christian and rabbinic institutions in the second and third centuries. Daniel Boyarin has argued that Judaism and Christianity only became clearly distinct religions by the fourth century CE, shaped by mutual boundary-drawing.

What was the first Christian church?

The earliest Christian communities were house churches — small groups meeting in private homes, not dedicated church buildings. The Jerusalem community led by James, Peter, and John is traditionally considered the first, with Antioch (in Roman Syria) as the city where followers were first called 'Christians' (Acts 11:26). Paul's letters, composed in the 50s CE, describe house churches in Corinth, Thessalonica, Philippi, and Rome. Purpose-built church structures did not appear until the third century CE.