On May 3, 1791, the parliament of the Polish-Lithuanian Commonwealth gathered in the Royal Castle in Warsaw and voted to adopt a document that changed the course of constitutional history. The Government Act, known to history as the Constitution of May 3, became the first codified, modern constitution in Europe and the second in the world, after the Constitution of the United States adopted in 1787.
It introduced a tripartite separation of powers, abolished one of the most destructive parliamentary mechanisms in European history, extended rights to townspeople and peasants, and grounded the authority of government in the sovereignty of the nation. Edmund Burke, the Irish statesman and political philosopher, praised it as the noblest benefit received by any nation at any time. Thomas Paine, the revolutionary pamphleteer, celebrated its progressive spirit.
The world’s most powerful neighbors reacted with hostility. Within nineteen months, the Constitution was annulled. Within four years, Poland itself had ceased to exist as a sovereign state.
Yet the ideas embedded in that document survived the partitions that erased Poland from the map of Europe, sustained two nations through 123 years of foreign rule, and established a founding myth of democratic aspiration that the Polish people have returned to in every generation since.
The Polish-Lithuanian Commonwealth: A Flawed Giant on the Edge of Collapse
To understand why the Constitution of May 3, 1791 was so urgently necessary, it is important to understand the state that produced it. The Polish-Lithuanian Commonwealth, formed by the Union of Lublin in 1569, was in its prime one of the largest and most distinctive political entities in Europe. At its peak in the 17th century, it stretched from the Baltic Sea to the Black Sea, encompassing modern-day Poland, Lithuania, Latvia, Belarus, much of Ukraine, and parts of Russia. It practiced a degree of religious tolerance that was unusual in post-Reformation Europe and had developed parliamentary institutions far earlier than most of its neighbors.
The Commonwealth was governed as a constitutional monarchy, but the practical reality was that real power lay with the szlachta, the Polish nobility, who jealously guarded their privileges and viewed a strong central government as a threat to their freedom. Over the 17th and early 18th centuries, those privileges had gradually undermined the state.
The most destructive instrument was the liberum veto. Under this parliamentary rule, any single deputy to the Sejm, the commonwealth’s parliament, could dissolve the entire session and nullify every piece of legislation it had passed simply by saying “I do not allow it.” The veto required unanimous consent for all legislation. What had begun as a protection against royal overreach had become, in practice, a mechanism by which foreign powers and self-interested magnates could paralyze the government by bribing or pressuring a single deputy. Between 1652 and 1764, the liberum veto was successfully invoked 53 times, dissolving 53 sessions of the Sejm and preventing any coherent national policy.
The First Partition of 1772 was the catastrophic result. Russia under Catherine the Great, Prussia under Frederick the Great, and Austria under Maria Theresa agreed among themselves to simply take large chunks of Commonwealth territory. Poland lost approximately one-third of its territory and nearly half its population without a single effective military response. The partition was a stunning demonstration of how completely the Commonwealth’s dysfunctional government had rendered it incapable of defending itself.
The Enlightenment Comes to Warsaw: Reform, Education, and the Push for Change
The shock of the First Partition galvanized a reform movement that had been building quietly for decades. Poland’s Enlightenment reformers understood that the country’s survival required fundamental restructuring of its political institutions. Their work during the 1760s, 1770s, and 1780s laid the intellectual foundation for the 1791 Constitution.
King Stanisław August Poniatowski, elected in 1764 as the Commonwealth’s last monarch, was an unusual figure in European kingship. He was genuinely learned, a patron of the arts and sciences, and deeply influenced by Enlightenment ideas about rational governance. In 1765, he founded the Cadet School, the first secular school in Poland. He supported the work of Count Andrzej Zamoyski on restricting the liberum veto. Most notably, he championed the creation of the Komisja Edukacji Narodowej, the Commission of National Education, in 1773, which is recognized as the first Ministry of Public Education established anywhere in the world.
Writers and thinkers like Hugo Kołłątaj and Stanisław Staszic produced influential pamphlets arguing for sweeping political and social reform. Kołłątaj, a priest, philosopher, and political radical who became one of the primary authors of the Constitution, was a forceful advocate for extending rights beyond the nobility. Staszic emphasized the need to reform Polish society from the ground up, including the conditions of the peasant majority. Their arguments helped shift educated Polish opinion toward accepting that the old system of noble privilege was not freedom but dysfunction.
The process that would produce the Constitution was formally launched in 1787, when Ignacy Potocki, the Grand Marshal of Lithuania and a leading figure of the reform party, was selected to coordinate the legislative reform effort.
The Four-Year Sejm and the Secret Plan for Reform
In October 1788, the Commonwealth’s parliament convened in Warsaw for what would become known as the Four-Year Sejm, or the Great Sejm. It was an extraordinary legislative session that sat continuously for four years, an unusual arrangement made possible by forming itself into a confederated Sejm, which was not subject to the liberum veto. The reformers had learned from the past. They were not going to let a single hostile deputy undo their work.
Anti-Russian sentiment ran high among the deputies, and the reform party, headed by Ignacy Potocki, Stanisław Małachowski (the Sejm’s Speaker and Marshal), and Hugo Kołłątaj, pressed for comprehensive change. They enjoyed the support of the city’s burgher population, who in late 1789 organized the so-called Black Procession, a mass demonstration in Warsaw in which thousands of townspeople marched to the Sejm demanding full political rights for the bourgeoisie. The reformers, aware of what had just happened in France when popular grievances were ignored, took the message seriously.
On April 18, 1791, just two weeks before the Constitution itself, the Sejm adopted the Free Royal Cities Act, which expanded burghers’ rights, including the right to own landed estates, hold lower offices, pursue legal careers, and hold officer ranks in the military. This act was considered an integral part of the constitutional reform package.
From December 1790 onward, the core group of reformers met in secret. The group grew to around 60 members and included Stanisław August himself, Ignacy Potocki, Hugo Kołłątaj, Stanisław Małachowski, Julian Ursyn Niemcewicz, Tadeusz Matuszewicz, and the Italian priest Scipione Piattoli, who served as King Poniatowski’s secretary and acted as a kind of diplomatic facilitator within the reformist circle. They drafted, revised, and argued over the text through the winter and spring of 1791.
As the reformers finalized the document, they made a deliberate tactical decision. The vote would be held immediately after Easter, when many conservative deputies had left Warsaw for their country estates and had not yet returned to the capital. The session was scheduled for May 3, 1791. Loyal troops were positioned around the Royal Castle to prevent disruption. The reformers knew that if their opponents organized before the vote, the Constitution would be killed.
May 3, 1791: The Day the Constitution Was Passed
On the morning of May 3, 1791, members of the Sejm assembled at the Royal Castle in Warsaw. The atmosphere was charged. Deputies who had returned early from their Easter break, and who were opposed to reform, tried procedural maneuvers to delay or block the vote. One deputy, Jan Suchorzewski, made a particularly dramatic gesture, reportedly throwing himself at the feet of his young son and declaring that he would rather kill the child than see him live under the tyranny of the new laws. The scene was theatrical and did not stop the proceedings.
Stanisław Małachowski, as Marshal of the Sejm, guided the session with firm authority. The reformers held enough votes. The Constitution passed with the majority present approving it. As the vote was confirmed, Stanisław August Poniatowski descended from his throne and walked to the church adjoining the castle, where he took an oath to uphold the Constitution. The deputies who had supported it followed him, lifting Małachowski on their shoulders in celebration. Crowds outside the castle cheered.
The Constitution that emerged was an eleven-article document officially titled Ustawa Rządowa, the Government Act. It was the product of many hands, but its principal authors were the King, Ignacy Potocki, and Hugo Kołłątaj, with Kołłątaj credited with giving the document its final linguistic shape. As King Stanisław August himself described it, the Constitution was “founded principally on those of England and the United States of America, but avoiding the faults and errors of both, and adapted as much as possible to the local and particular circumstances of the country.”
What the Constitution Actually Said: Reforms That Shook Europe
The Constitution of May 3 introduced a set of reforms that were, by the standards of 18th-century Europe, genuinely radical. Taken together, they transformed the structural basis of the Commonwealth’s government.
The liberum veto was abolished completely. The Constitution’s language was uncompromising: “we abolish forever the liberum veto, confederations of any kind, and confederate sejms, as being opposed to the spirit of this Constitution, subversive of government, and destructive of society.” Majority vote would henceforth govern parliamentary decisions. The era of a single bribed deputy being able to nullify years of legislation was over.
The Constitution established a clear tripartite separation of powers: the legislature vested in a two-chamber Sejm, the executive in the King and his Council of Guardians of the Laws, and the judiciary in independent courts. The King was made head of the executive branch, presiding over a cabinet of ministers who countersigned his acts and bore responsibility for them, similar to the principle of ministerial responsibility found in English constitutional practice.
The monarchy was made hereditary rather than elective. The Elector of Saxony, Frederick Augustus of the Wettin dynasty, was designated as successor to Stanisław August. The reform ended the damaging tradition of contested royal elections, during which foreign powers regularly intervened to install favorable candidates.
Political equality was extended between the szlachta (nobility) and the burghers (townspeople), building on the Free Royal Cities Act passed just weeks before. Peasants were placed under the formal protection of the law and the state, which mitigated the worst abuses of serfdom, even though it stopped short of abolishing serfdom outright. The Constitution explicitly grounded its authority in the “will of the nation,” establishing the principle of popular sovereignty.
The document was supplemented on October 20, 1791 by the Mutual Pledge of the Two Nations, which reaffirmed the federal character of the Commonwealth and guaranteed Lithuania’s equal status, including its own ministries and separate legal system.
May 3 was declared a public holiday just two days after the Constitution’s passage, on May 5, 1791. It has been observed as Poland’s Constitution Day ever since, with the exception of the periods of foreign occupation when celebration was forbidden. The full text of the 1791 Constitution is available for historical study through the Constitute Project’s archive of Poland’s 1791 Constitution.
Catherine the Great’s Response: Invasion, Confederation, and Annulment
The reaction from Poland’s neighbors was immediate and hostile. Catherine the Great of Russia viewed the Constitution as a direct threat. A stronger, more governable Poland was the last thing she wanted on her western border. She had grown accustomed to using the Commonwealth’s dysfunction as a tool of domination, and the liberum veto had been one of her most reliable instruments. Its abolition was a direct challenge to Russian influence.
Catherine was also alarmed by the constitutional ideas spreading from both America and France. The French Revolution had begun in 1789, and she had no intention of allowing reformist Enlightenment politics to take root on Russia’s doorstep. She identified willing partners among the most conservative Polish magnates, men who feared that the Constitution would reduce their traditional privileges and social dominance.
The Targowica Confederation, named for the town in Ukraine where its founding declaration was announced on May 14, 1792, was the result. Its leaders, including Stanisław Szczęsny Potocki, Seweryn Rzewuski, Franciszek Ksawery Branicki, and Szymon Kossakowski, signed their act of confederation in Saint Petersburg on April 27, 1792, in the presence of Russian officials. They invited Russian forces to enter the Commonwealth on the pretext of restoring the old liberties that the Constitution had abolished.
Russian forces invaded in May 1792. The Commonwealth’s army, commanded by Prince Józef Poniatowski (the King’s nephew) and Tadeusz Kościuszko, fought with considerable skill at the battles of Zieleńce and Dubienka, but was vastly outnumbered. Frederick William II of Prussia, who had been allied with the Commonwealth, broke that alliance and refused to provide assistance. On July 24, 1792, King Stanisław August Poniatowski capitulated and joined the Targowica Confederation, believing he could moderate the outcome from within. He could not. The Second Partition of Poland followed in 1793, when Russia and Prussia simply helped themselves to more Polish territory. The Constitution was declared null and void by the coerced Grodno Sejm in 1793.
In 1794, Tadeusz Kościuszko led an insurrection in an attempt to restore the Commonwealth and its Constitution. Despite early successes, the uprising was crushed. Kościuszko himself was wounded and captured at the Battle of Maciejowice in October 1794. The Third Partition in 1795, signed by Russia, Prussia, and Austria, eliminated the Polish-Lithuanian Commonwealth from the map of Europe entirely. The three imperial powers agreed in writing that the name of Poland should never appear in history again.
The Wikipedia article on the Constitution of 3 May 1791 provides an exhaustive scholarly account of its drafting, contents, and aftermath at the Wikipedia entry on the Constitution of 3 May 1791.
The Legacy That Outlasted the State: 123 Years of Occupied Memory
The Constitution of May 3 was in force for less than nineteen months. Yet its legacy proved far more durable than the state it had briefly governed. Ignacy Potocki and Hugo Kołłątaj, writing in exile, called it “the last will and testament of the expiring Homeland.” Polish constitutional scholar Bronisław Dembiński later wrote that although the Constitution failed to preserve the state, it “did save the nation.”
Throughout the 123 years of Polish and Lithuanian partition, the memory of the Constitution served as a focal point for national identity and the aspiration for restored sovereignty. Poles in exile, underground schools operating under Russian, Prussian, and Austrian occupation, and successive generations of patriots kept alive the memory of a moment when their nation had acted first among the nations of Europe to establish modern constitutional governance.
The Constitution was translated into French, German, and English in 1791 itself. It attracted admiration across the Atlantic world and throughout Enlightenment Europe. Norman Davies, one of the foremost historians of Poland, calls it simply “the first constitution of its type in Europe.” Albert Blaustein, the constitutional law expert, designates it “the world’s second national constitution.” Constitutional historians continue to debate the precise ranking, with rival claims from Corsica’s 1755 constitution and the short-lived Swedish instrument of 1772, but the consensus of modern scholarship strongly supports the Polish-Lithuanian document’s claim to European primacy in the modern sense.
Poland regained sovereignty in 1918 after World War I destroyed the three empires that had partitioned it. The new republic adopted its own constitution in 1921, consciously drawing on the 1791 tradition. Constitution Day on May 3 was observed during the interwar Second Republic, forbidden under Nazi occupation and Communist rule, and restored as a national holiday in 1990 after Poland’s democratic transition. It is celebrated every year in Warsaw at Castle Square, where the original document was passed, with ceremonies that connect modern Poland to its 18th-century constitutional founding.
The Polish History Museum’s digital exhibition on the Constitution of 3 May 1791 is available through Google Arts and Culture at the Google Arts and Culture entry on the Constitution of 3 May 1791, offering access to original documents, portraits of key figures, and historical maps.
The document passed in Warsaw on May 3, 1791 was an act of political courage carried out in the full knowledge that powerful neighbors might destroy the state for attempting it. They did. But they could not destroy the idea. Constitutionalism, popular sovereignty, the separation of powers, the protection of citizens’ rights under law: these were the gifts the Polish-Lithuanian reformers offered to Europe. It took the rest of the continent most of the following century to accept them fully.