The French Revolution

Why did the French constitutional monarchy collapse between 1791 and 1792?

Quick answer

France's constitutional monarchy collapsed because King Louis XVI secretly opposed constitutional limits on his power. After his flight to Varennes and military vetoes destroyed public trust, the outbreak of war in April 1792 fueled fears of royal treason, prompting armed Parisian radicals to overthrow the king on August 10, 1792.

The topic explained

A King Who Refused to Share Power

The downfall of the French constitutional monarchy began with the Constitution of 1791. Completed in September 1791, this document ended absolute Bourbon rule and established a constitutional monarchy. Lawmaking power went to an elected Legislative Assembly of 745 deputies. King Louis XVI kept executive authority and a suspensive veto, which allowed him to delay laws for up to four to six years.

The new system was fragile from day one. It granted the right to vote only to active citizens, defined as men aged 25 or older who paid direct taxes equal to at least three days of manual labor. This left roughly three million poorer men, known as passive citizens, and all women without political power. More importantly, King Louis XVI did not believe in the system he had sworn to uphold.

The Flight to Varennes and Broken Trust

Public trust suffered a fatal blow before the constitution even took effect. On the night of June 20, 1791, the royal family disguised themselves as common travelers and fled Paris in a carriage toward the northeastern border. Louis XVI intended to rally loyal troops at Montmedy and negotiate from strength with Austrian backing.

On June 21, the king was recognized at Sainte-Menehould and arrested in the small town of Varennes. Before leaving Paris, he had left behind a signed manifesto repudiating the revolution's reforms. The flight proved to the French public that the king was actively working against his own government, sparking the first major demands for an outright republic.

War, Vetoes, and the Fall of the Throne

In April 1792, France declared war on Austria, and Prussia soon joined the fight. Girondin politicians wanted war to expose traitors and spread liberty. Louis XVI supported the war hoping the allied monarchies would win and restore his absolute power. Early French military defeats caused panic across Paris.

When the Legislative Assembly passed emergency defense decrees in early summer 1792, Louis XVI used his suspensive veto to block them and dismissed his reform-minded ministers. On July 25, the allied commander issued the Brunswick Manifesto, threatening Paris with destruction if the royal family was harmed. To Parisians, this confirmed the king was working with foreign invaders. On August 10, 1792, armed citizens and provincial soldiers stormed the Tuileries Palace, ending the monarchy and leading to the declaration of the French Republic on September 21, 1792.

Free printable worksheet

The Collapse of the French Constitutional Monarchy (1791–1792)

This worksheet is for 10th-grade history students. Read each prompt carefully and answer using specific evidence from the text.

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The Collapse of the French Constitutional Monarchy (1791–1792)Name:

Identify the key power the Constitution of 1791 granted to the king to delay legislation.
What was the difference between an active citizen and a passive citizen under the 1791 constitution?
Explain why the king's flight to Varennes in June 1791 destroyed the public's trust in him.
Why did both the revolutionary Girondins and King Louis XVI vote for or support war against Austria in April 1792?
Describe the impact of the Brunswick Manifesto on the people of Paris in late July 1792.
Read the following statement: 'The storming of the Tuileries on August 10, 1792, was caused entirely by foreign invasion.' Defend or critique this claim with two specific historical causes.

Common questions

What grade level is this lesson written for?

This topic is written for 10th-grade world history students, typically ages 15 to 16, covering the constitutional phase of the French Revolution.

Why did the National Assembly retain the king in 1791 instead of creating a republic right away?

Most assembly deputies were moderate reformers who feared social disorder. They believed a constitutional monarch was necessary to maintain stability, execute laws, and prevent radical mob rule.

What happened to King Louis XVI after August 10, 1792?

The Legislative Assembly suspended Louis XVI and imprisoned him with his family. The newly elected National Convention abolished the monarchy in September 1792, tried him for high treason, and executed him by guillotine in January 1793.

What was the September Massacres of 1792?

In early September 1792, panic spread through Paris as Prussian forces advanced. Fearing prison revolts would aid the invaders, crowds attacked city prisons, killing between 1,100 and 1,400 inmates after improvised trials.

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