Introduction

When Caligula was assassinated in AD 41, the empire teetered between chaos and reform.
The Senate debated restoring the Republic, but the Praetorian Guard made their choice: they found Claudius, uncle to Caligula, hiding behind a curtain in the palace, and proclaimed him emperor.
He would reign from AD 41 to 54 — thirteen years that gave the early church unprecedented space to grow.

Claudius was no outsider to Rome’s first imperial family.
He was the step-grandson of Augustus through Augustus’ marriage to Livia Drusilla, the grandmother who raised him.
This Julio-Claudian lineage tied Claudius directly to the imperial tradition of Julius Caesar and Augustus — and under his rule, he would restore and reaffirm the protections for the Jews that both men had supported.

Roman historians describe Claudius as bookish, awkward, and underestimated — the butt of jokes in his own family. Yet when given the throne, he proved unexpectedly competent, bringing stability after years of volatility.

For the Jewish people — and for the Christians still seen as part of Judaism — this meant an abrupt reversal from Caligula’s threats.
Claudius restored and reaffirmed the privileges and protections for Jewish communities that had first been granted by Julius Caesar and confirmed by Augustus.
This meant legal recognition of their right to keep the Sabbath, follow their food laws, send offerings to the Temple, and live according to their ancestral customs.

It was during these years that Paul completed all three missionary journeys and wrote his earliest letters, as recorded in the book of Acts.

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Christians Were Still Seen as Jews

In the early 40s AD, Rome still made no distinction between Jews and Christians.
The followers of Jesus worshiped in synagogues and kept many Jewish customs.
Their legal standing was tied to that of the Jewish people.

That meant that Claudius’ actions to protect Jewish rights automatically extended to Christians as well.
The legal umbrella was still intact.

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Claudius’ Letter to the Alexandrians

Shortly after taking power, Claudius addressed a violent conflict between Jews and Greeks in Alexandria — the same city where Philo had once pleaded with Caligula for relief.
Claudius sent a decree restoring order and reaffirming Jewish rights.

Josephus, Antiquities 19.278–285 (c. AD 93):
“Tiberius Claudius Caesar Augustus Germanicus, imperator, consul, tribune of the people, to the city of the Alexandrians, greeting.

I have long been aware of the troubles which have existed in your city between the Jewish and the Greek inhabitants, and of the recent outbreaks that occurred under my predecessor Gaius. Now, having become emperor, and desiring to settle these disturbances, I issue this decree.

I therefore command the Greeks and the Jews who live in the same city not to engage in further unrest or unlawful behavior toward one another.

The Jews shall not again be expelled from Alexandria, nor shall their rights be diminished, but they are to continue to inhabit the city in accordance with their ancestral customs.

They are not to bring in or admit Jews from Syria or Egypt as new settlers in the city, but only those who already reside there may continue in peace.

I strictly forbid them to hold public meetings except in accordance with their ancestral customs and only in those places officially assigned to them — meaning their synagogues.

Furthermore, I order that no one shall insult them or interfere with their observance of the Sabbath, or any of their other traditional rites and customs.

They are to enjoy all the rights and privileges they formerly had under Augustus and the other emperors.

If anyone violates this order — Jew or Greek — I shall take vengeance on them as a disturber of the peace, no matter what nation they belong to.”

This was one of Claudius’ very first acts as emperor — a clear break from Caligula’s religious aggression and a deliberate restoration of the policies of Julius Caesar and Augustus.

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Claudius’ General Decree to the Provinces

Claudius didn’t stop with Alexandria. He issued a broader decree to all the provinces, making protection of Jewish customs an imperial policy.

Josephus, Antiquities 19.286–291:
“Tiberius Claudius Caesar Augustus Germanicus, imperator and consul for the second time, issues the following decree:

Since I am fully persuaded that the Jewish people — not only in Alexandria but throughout the entire world — have increased in numbers and are living with prosperity,

and since they have continually demonstrated loyalty to us and to our ancestors, especially in matters of religion and public conduct,

I judge it right that they should be permitted to continue in observance of their ancestral customs without interference.

Therefore I order that the same privileges granted to them from the time of Augustus — and after him by my father Drusus and my brother Germanicus — be fully maintained in all the cities under Roman rule.

I command that no one shall molest them or compel them to abandon their customs, particularly concerning:
— the keeping of the Sabbath,
— their food laws,
— and their sending of offerings to the Temple in Jerusalem.

In these matters, the Jews are not to be harassed or charged with offenses, so long as they continue in their loyalty and orderly conduct.”

This decree explicitly names Augustus as the source of these rights — and Augustus had been continuing what Julius Caesar had already put in place decades earlier. Claudius was not inventing new privileges; he was reinforcing a long-standing imperial policy that gave Jews, and by extension early Christians, freedom to practice their faith.

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The Rome Expulsion

Despite his protections for Jewish customs, Claudius would not tolerate unrest in the capital.
Around AD 49 or 50, disturbances among the Jewish population in Rome led to a sweeping expulsion.

Acts 18:2:
“There he met a Jew named Aquila, a native of Pontus, who had recently come from Italy with his wife Priscilla, because Claudius had ordered all the Jews to leave Rome.”

Suetonius, Life of Claudius 25.4 (c. AD 110–130):
“Since the Jews constantly made disturbances at the instigation of Chrestus, he expelled them from Rome.”

“Chrestus” is almost certainly a misunderstanding of “Christus” — Christ. The unrest likely involved disputes within the Jewish community over Jesus as the Messiah.

Among those expelled were Aquila and Priscilla, who were already Christians when Paul met them in Corinth. Acts never records their conversion; they immediately appear as trusted co-laborers in ministry.

Christianity had, by this point, already reached Rome before Paul ever visited. Paul confirms this in Romans 1:8, writing, “Your faith is being reported all over the world.” The church in Rome likely began through Jewish believers who had been in Jerusalem at Pentecost (Acts 2:10) and carried the gospel back home.

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What Was Happening in the Church?

Claudius’ reign was one of the most formative in early church history:

• James the brother of John was martyred c. AD 44
  • Emperor: Claudius
  • Official: Herod Agrippa I (Acts 12:1–2)
• Peter was arrested, likely to be executed next (Acts 12:3–11)
• Paul’s First Missionary Journey: AD 46–48 (Acts 13–14)
• The Jerusalem Council: AD 49 (Acts 15)
• Paul’s Second Missionary Journey: AD 49–52 (Acts 15:36–18:22)
• Paul tried before Gallio, Roman proconsul of Achaia (Acts 18:12–17)
• Paul’s Third Missionary Journey: AD 52–54 (Acts 18:23–21:16)

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Paul’s Letters During Claudius’ Reign

Several of Paul’s letters were written under Claudius:

• Galatians – c. AD 48–49, likely between the first and second journeys, addressing the push to require Gentile Christians to keep the Mosaic Law.
• 1 Thessalonians – c. AD 50–51, written from Corinth during the second journey to encourage a persecuted young church.
• 1 Corinthians – c. AD 53–54, written from Ephesus during the third journey to address division, immorality, and doctrinal confusion.

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Persecution Continued Under Claudius

Although Claudius’ reign provided legal protection through Judaism’s recognized status, Paul’s own letters from this period show that persecution was an ongoing expectation and reality for the church.

In Galatians, Paul warns against compromising the gospel under pressure from those demanding Gentile believers keep the law (Galatians 1:6–10; 4:29).
In 1 Thessalonians, he commends the believers for standing firm in the face of suffering: “You suffered from your own people the same things those churches of God suffered from the Jews” (1 Thessalonians 2:14).
In 1 Corinthians, he speaks of apostles being “condemned to die in the arena” and “made a spectacle to the whole universe” (1 Corinthians 4:9).

This persecution came from multiple directions —

• Jewish authorities, as seen in Paul’s repeated synagogue expulsions (Acts 13:45–50; 14:2–6; 17:5–9).
• Local Gentile opposition, stirred up by economic or religious concerns (Acts 16:19–24; 19:23–41).
• And from rulers like Herod Agrippa I, who executed James the brother of John and imprisoned Peter in Jerusalem during Claudius’ reign (Acts 12:1–3).

Even in this window of stability, Paul and the churches he planted understood that following Christ meant sharing in his sufferings — a reality they embraced alongside the rapid spread of the gospel.

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The Crucial Window: Caligula to Nero

Between Caligula’s threats to desecrate the Temple and Nero’s fire in AD 64 came a rare 13-year window of stability under Claudius.
In that time:

• Paul completed all three missionary journeys.
• The gospel spread across Syria, Galatia, Macedonia, and Achaia.
• The first New Testament letters were written.
• The church began to define the gospel for both Jew and Gentile.
• Christianity had already reached Rome before Paul arrived, and the church there was strong enough for him to say their faith was known “all over the world” (Romans 1:8).

Had Claudius ruled like Caligula — or had Nero come to power earlier — the story could have been very different.

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Conclusion

Claudius died in AD 54, likely poisoned by his wife Agrippina.
Her son, Nero, became emperor.
And under Nero, the fire would start.

But for just over a decade, the church had room to grow — protected under the legal status of Judaism, traveling freely across the empire, planting congregations, writing the Scriptures that would anchor the Christian faith, and enduring persecution with the expectation that it was part of following Christ.