De-Christianization in AP European History

De-Christianization was the radical-phase French Revolution policy (1793-1794) of removing Christian influence from French society by closing churches, suppressing worship, replacing the Gregorian calendar with a revolutionary one, and substituting secular cults like the Cult of the Supreme Being.

Verified for the 2027 AP European History examLast updated June 2026

What is de-Christianization?

De-Christianization was the Jacobin republic's attempt to erase Christianity from French public life during the radical phase of the French Revolution. It went way beyond the liberal phase's move to nationalize the Catholic Church and put priests on the state payroll. Under de-Christianization, churches were closed or converted into 'Temples of Reason,' public worship was banned, religious symbols were destroyed, and priests were pressured to abandon their vocations.

The most exam-famous pieces are the replacements. The revolutionary calendar scrapped the seven-day week (and Sundays with it), renamed the months, and restarted Year I at the founding of the republic. Robespierre's Cult of the Supreme Being (1794) tried to install a state-sponsored deist religion in Christianity's place. The logic was simple. The Church was tied to the Old Regime, monarchy, and counterrevolution, so a truly new France had to be a post-Christian France.

Why de-Christianization matters in AP® Euro

De-Christianization lives in Topic 5.4 (The French Revolution) in Unit 5: Conflict, Crisis, and Reaction in the Late 18th Century, supporting learning objective 5.4.A, which asks you to explain the causes, events, and consequences of the Revolution. Specifically, it's your best evidence for KC-2.1.IV.C, the radical Jacobin republic under Robespierre responding to opposition at home and war abroad with extreme measures. De-Christianization is also a perfect 'radicalization' marker. If you can explain how the Revolution moved from nationalizing the Church (liberal phase, KC-2.1.IV.B) to banning worship entirely (radical phase), you've shown exactly the kind of change-over-time thinking AP Euro rewards. It also connects to the long-running theme of secularization that starts with the Enlightenment and runs through the rest of the course.

How de-Christianization connects across the course

Committee of Public Safety (Unit 5)

De-Christianization was enforced by the same machinery that ran the Terror. The Committee of Public Safety treated religious loyalty as a political threat, which is why a practice question pairs banned worship and the new calendar with price controls and executions as one package of radical Jacobin policy.

Catholic Church (Unit 5)

The Church wasn't a random target. It was the First Estate, a massive landowner, and a pillar of the Old Regime. Attacking Christianity was a way of attacking the entire pre-revolutionary social order at its roots.

Constitution of 1791 (Unit 5)

The liberal phase that produced the Constitution of 1791 had already nationalized the Catholic Church and made clergy state employees. De-Christianization shows how far the Revolution radicalized past that point, from reforming the Church to trying to abolish Christianity outright.

Directory (Unit 5)

After Robespierre's fall, the Thermidorian reaction and the Directory quietly let de-Christianization die, and Napoleon's Concordat of 1801 later restored Catholicism's place in France. That reversal is great evidence that the most radical revolutionary experiments didn't stick.

Is de-Christianization on the AP® Euro exam?

Multiple-choice questions love using de-Christianization as a marker of the radical phase. Common stems ask what the revolutionary calendar 'most directly reflected,' what the Cult of the Supreme Being was 'primarily intended to' do, or which concept explains the Committee of Public Safety banning worship alongside fixing prices and executing enemies. The expected answer usually points to radical Jacobin secularization or the rejection of the Old Regime. No released FRQ has used the term verbatim, but it's strong evidence for LEQs and DBQs on the radicalization of the French Revolution or on long-term secularization in Europe. The key move is sequencing. Don't just say 'the Revolution attacked the Church.' Show that the liberal phase nationalized it and the radical phase tried to erase it.

De-Christianization vs Nationalization of the Catholic Church (Civil Constitution of the Clergy)

These happened in different phases and had different goals. Nationalizing the Church (1790, liberal phase) kept Catholicism but put it under state control, with clergy paid by and loyal to the government. De-Christianization (1793-1794, radical phase) tried to eliminate Christianity itself, banning worship and replacing it with secular cults and a new calendar. If an exam question mentions the constitutional monarchy era, think nationalization. If it mentions Robespierre, the Terror, or the revolutionary calendar, think de-Christianization.

Key things to remember about de-Christianization

  • De-Christianization was the radical Jacobin policy of removing Christian influence from French society during the Reign of Terror (1793-1794).

  • It included closing churches, banning public worship, destroying religious symbols, and pressuring priests to renounce their roles.

  • The revolutionary calendar replaced the Gregorian calendar, eliminated Sundays, and dated Year I from the founding of the republic.

  • Robespierre's Cult of the Supreme Being (1794) was a state-sponsored deist substitute for Christianity, not a return to Catholicism.

  • De-Christianization marks the shift from the liberal phase, which nationalized the Church, to the radical phase, which tried to abolish Christianity entirely.

  • The policy collapsed after Robespierre's fall, showing how the most extreme revolutionary experiments were reversed during the Thermidorian reaction.

Frequently asked questions about de-Christianization

What was de-Christianization in the French Revolution?

De-Christianization was the radical Jacobin campaign (1793-1794) to remove Christianity from French life by closing churches, banning worship, replacing the calendar with a revolutionary one, and creating secular substitutes like the Cult of the Supreme Being.

Did de-Christianization make France permanently atheist?

No. The policy collapsed after Robespierre's execution in 1794, and Napoleon's Concordat of 1801 restored Catholicism's official place in France. It was a short-lived radical experiment, not a permanent transformation.

How is de-Christianization different from the Civil Constitution of the Clergy?

The Civil Constitution of the Clergy (1790) kept Catholicism but nationalized the Church and made priests state employees during the liberal phase. De-Christianization (1793-1794) tried to eliminate Christianity altogether during the radical phase under the Jacobins.

What was the Cult of the Supreme Being?

It was a deist state religion Robespierre established in 1794 to replace Christianity with worship of a generic supreme being and revolutionary virtue. On the AP exam, it's the go-to example of de-Christianization's replacement religions.

Why did the revolutionary calendar matter for de-Christianization?

The new calendar erased the Christian structure of time itself. It eliminated Sundays and saints' days, renamed the months, and restarted history at Year I of the republic, signaling that the Jacobins wanted a total break with France's Christian past.