The World of the Persecuted Church: What Was Happening When the Apostles' Creed Took Shape

The Apostles' Creed has no single author and no single birthdate. It grew slowly, over roughly two centuries, out of the baptismal practice of the early church — which means understanding it means understanding the world its earliest form was born into: the house churches and catacombs of the Roman Empire in the second century.

A Church Without Buildings

There were no church buildings in the 100s AD, no seminaries, no printing presses. Christianity was a movement meeting in homes, led by bishops and elders who had often known the apostles or their direct successors. When someone wanted to become a Christian, they didn't sign a card or fill out a form — they were catechized, sometimes for years, and then asked to publicly confess what they believed before being baptized.

That confession is the seed of what we now call the Apostles' Creed. Scholars often point to the "Old Roman Creed" — a shorter, question-and-answer baptismal formula used in the church at Rome by the early second century — as its direct ancestor. A candidate for baptism would be asked three questions, one for each person of the Trinity, and would answer "I believe" before being immersed three times.

A Faith Practiced Under Watch

This was not a safe or comfortable environment for confessing Christ. Rome did not conduct empire-wide persecutions in this period the way later propaganda sometimes suggests, but Christianity was, at various points and places, illegal simply by virtue of refusing to honor the Roman civic cult. The famous correspondence between the provincial governor Pliny the Younger and the Emperor Trajan, around 112 AD, shows this tension plainly: Pliny asks how to handle Christians brought before him, uncertain whether mere membership in the faith was itself the crime, or the associated refusal to sacrifice to the emperor. Trajan's answer — don't seek them out, but punish those who are accused and refuse to recant — set an uneasy pattern of localized, sporadic, but real danger that lasted for generations.

Confessing "I believe in Jesus Christ" in that world was not an abstract theological exercise. It could cost you your standing, your property, or your life. That reality shaped the creed's form as much as its content.

Why the Creed Stayed Short

There is a reason the Apostles' Creed is so brief and rhythmic compared to later, more theologically elaborate confessions. It had to be memorized by ear, by ordinary converts — many of them illiterate — passed down through oral catechesis rather than printed pamphlets. Simplicity was not a theological compromise; it was a practical necessity for a movement without institutional protection, meeting in secret in many places, needing a confession its members could carry in their memory rather than on a page that might be confiscated.

The core structure that emerges from this period — belief in God the Father, in Jesus Christ His Son, and in the Holy Spirit, alongside the church, the resurrection, and life everlasting — remained remarkably stable for centuries even as the wording continued to develop toward the form we use today.

What Changed, and What Didn't

By the time the church gathered at Nicaea in 325 AD to hammer out the Nicene Creed, the world would look very different two centuries later at Nicaea — Christianity had gone from an illegal minority movement to the empire's favored faith almost overnight. But the Apostles' Creed's DNA — its baptismal shape, its Trinitarian structure, its plain and memorable language — never left the tradition. It's why, to this day, it remains the creed most commonly used in the baptism of new believers across nearly every Christian tradition on earth.

Why This Still Matters

Christians in dozens of countries today still confess this creed under real risk — in contexts where conversion is illegal, where baptism means real social or legal cost. When you say "I believe" today, whether in comfort or in danger, you're standing in the same act of confession that Christians in Rome's house churches performed nearly two thousand years ago: naming your ultimate loyalty out loud, whatever the world around you does with that.

Next in this series: What changed for the church between the persecuted world of the Apostles' Creed and the imperial world of the Nicene Creed? Read "The World Constantine Inherited" on NiceneCreed.info.