Polish–Lithuanian Commonwealth

• 1. Introduction

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  The Polish-Lithuanian Commonwealth was, for a stretch of two centuries, the largest country in Europe by territory. On the 1st of July 1569, the Union of Lublin brought together the Kingdom of Poland and the Grand Duchy of Lithuania into a single political entity that would endure until 1795. At its peak in the early 17th century, it covered roughly one million square kilometres and held around twelve million people. That scale alone would make it remarkable. What makes it extraordinary is everything else: a parliament that could nullify its own laws with a single dissenting vote; a noble class that made up ten percent of the population and elected its own kings; a written guarantee of religious freedom signed in 1573 that protected Catholics, Jews, Orthodox Christians, Protestants and Muslims under the same roof. This is the story of a state that invented constitutional monarchy while its neighbours were perfecting absolute rule, that reached a territorial zenith and a political catastrophe in the same century, and that produced the first modern codified constitution in European history just four years before it ceased to exist.

• 2. The Union That Almost Did Not Happen

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  Jogaila, the Grand Duke of Lithuania, was a lifelong pagan when he signed the Union of Krewo on the 14th of August 1385. That document committed him to adopt Catholicism in exchange for marriage to Queen Jadwiga of Poland, a match that transformed Poland into a diarchy ruled by two sovereigns. For nearly two centuries the two states coexisted under that arrangement, neither fully merged nor fully separate. The final push toward union came not from enthusiasm but from fear. Lithuania's eastern flank was under pressure, and the lesser Lithuanian nobility coveted the political freedoms enjoyed by their Polish counterparts in the szlachta. Even so, prominent nobles including Mikołaj "the Red" Radziwiłł and his cousin Mikołaj "the Black" Radziwiłł vocally opposed the merger. The man who forced it through was Sigismund II Augustus. Childless and ailing, he knew that his death would end the Jagiellonian dynasty. He convened a parliament in Lublin on the 10th of January 1569 and, when resistant Lithuanian magnates walked out, used his authority as grand duke to enforce the Act of Union without them. The absent nobles, frightened by the consequences, returned. The Union passed on the 1st of July. Sigismund died in 1572, the last of his line, and the question of how to choose his successor would reshape the Commonwealth's politics for the next two centuries.

• 3. Golden Liberty

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  On the 11th of May 1573, approximately 40,000 nobles gathered outside Warsaw to choose a king by open vote. That election, the first of its kind, inaugurated a system the Commonwealth called Golden Liberty, a phrase that entered official use from 1573 onward. The winner was Henry de Valois, son of Henry II of France and Catherine de' Medici, a choice driven as much by bribes amounting to several hundred thousand ecus as by political calculation. Henry signed the Henrician Articles upon taking the throne, a constitutional document that bound every subsequent monarch to uphold noble privileges and religious tolerance. He then abandoned Poland in June 1574 to claim the French crown after his brother Charles IX died, leaving the throne vacant again. The Golden Liberty rested on several interlocking mechanisms. Each new king had to negotiate a pacta conventa with the nobles before coronation. The Sejm, the bicameral parliament, could veto legislation, foreign affairs, declarations of war and new taxes. The liberum veto allowed a single deputy to dissolve an entire parliamentary session and nullify everything it had passed. The right of rokosz permitted the szlachta to stage a legal rebellion against any king who violated their guaranteed freedoms. Chancellor Jan Zamoyski captured the philosophy in a phrase: Rex regnat et non-gubernat, meaning the king reigns but does not govern. The Zebrzydowski Rebellion of 1606-1607 marked the point at which this balance tipped decisively toward magnate oligarchy, with power draining away from the crown toward the largest noble families, and the liberum veto becoming a tool that foreign powers could exploit by bribing individual deputies to block reform.

• 4. From Zenith to Deluge

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  In July 1610, a Polish force of winged hussars, the elite heavy cavalry that defined the Commonwealth's military identity, defeated a larger Russian army at the Battle of Klushino. The victory allowed Polish troops to occupy Moscow for the next two years. The disgraced Tsar Vasili IV was transported in a cage to Warsaw, where he paid tribute to Sigismund III before being murdered in captivity. The war ended with territorial gains that represented the Commonwealth's largest-ever eastward expansion, and at least five million Russians died between 1598 and 1613 from the combined effects of famine, civil war and the Polish invasion. That high-water mark proved deceptive. The same king whose armies took Moscow had already alienated the Swedish throne through his intolerance of Protestantism, sparking a war of independence that ended the Polish-Swedish union and saw him deposed in Sweden by his uncle Charles IX Vasa. In 1655, a Swedish invasion known simply as the Deluge, supported by the forces of Transylvanian Duke George II Rákóczi and Frederick William, Elector of Brandenburg, tore through the Commonwealth. Under the Treaty of Bromberg in 1657, Poland was forced to renounce its control over Protestant Prussia. That once-minor duchy was elevated to the Kingdom of Prussia in 1701, and proved to be Poland's most persistent adversary for the rest of its existence. A period of internal crisis, foreign interference in royal elections, and bribes directed at Sejm deputies paralyzed the Commonwealth for more than a century, while its neighbours Russia, Prussia and Austria consolidated power and expanded their armies.

• 5. A World of Many Tongues

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  By the mid-16th century, eighty percent of the world's Jews lived in Poland. That statistic alone signals how unlike any other European state the Commonwealth was in its demographics. In 1569, the total population stood at seven million, composed of roughly 4.5 million Poles, two million Ruthenians, 750,000 Lithuanians and 700,000 Jews, alongside Czechs, Hungarians, Scots, Dutch settlers known as Olędrzy, Armenians, Italians and Romani. The Warsaw Confederation Act of 1573 guaranteed freedom of worship to all, and the legal scholar Norman Davies described the wording as extraordinary relative to conditions elsewhere in Europe at the time. A religious exile named Giovanni Bernardino Bonifacio d'Oria, writing from Poland to a colleague in Italy in 1561, put it plainly: no one was a censor there, and a person could write and publish according to their own ideas and preferences in the greatest of freedoms. The Commonwealth formally recognised an unusual range of languages: Polish, Latin, Ruthenian, German, Hebrew, Aramaic and Armenian all had official status at various points. Yiddish, Lithuanian, French and Italian were widely spoken without official recognition. Ruthenian remained the official language of the Grand Duchy's chancellery until 1697, when it was replaced by Polish. Cardinal Stanislaus Hosius, a papal legate, complained that the country had become a shelter for heretics. The French Catholic writer Rulhiere, reflecting on the 16th century from the vantage of the 18th, went further and called Poland the first state in Europe to exemplify tolerance, noting that mosques stood between churches and synagogues.

• 6. Grain, Rivers and the Folwark

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  Cereals, cattle and fur accounted for nearly ninety percent of the Commonwealth's exports in the 16th century. That figure reveals the economic spine of the state: the folwark, a large noble farmstead worked by serfs, produced surpluses that were shipped north along the Vistula and a network of other rivers to Gdańsk, the Baltic port city whose merchants controlled eighty percent of the inland grain trade. From Gdańsk, ships carried cargo to Antwerp and Amsterdam in the Low Countries. Land routes reached as far as Leipzig and Nuremberg, carrying herds of live cattle numbering around 50,000 head alongside salt, tobacco, hemp and cotton from the Greater Poland region. Slavery had been banned in Poland in the 15th century, and formally abolished in Lithuania in 1588, replaced by a system of serfdom. As the grain trade weakened from the late 17th century onward, disrupted by war and by Western Europe's growing access to resources from the Americas, the standard response was to increase serfs' workloads and restrict their movement further, a process the source describes as export-led serfdom. In 1794, Tadeusz Kościuszko issued the first Polish banknotes. Isfahan rugs imported from Persia had become so associated with the Commonwealth in Western European minds that they were sold under the label "Polish rugs," a misnomer that illustrated how central the Commonwealth was as a transit point between the Ottoman Empire, the Middle East and the West.

• 7. Science, Art and Architecture

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  Kraków's Jagiellonian University was founded in 1364, making it one of the oldest universities in the world. The Jesuit Academy of Wilno, established in 1579, joined it as a major scholarly centre. Together they supported a remarkable range of thinkers: Kazimierz Siemienowicz, born around 1600, was an artillery specialist credited as a founder of rocketry; Johannes Hevelius, born in 1611, founded lunar topography; Michał Boym, born in 1612, served as a cartographer, naturalist and diplomat in the service of the Ming Dynasty; and Baal Shem Tov, born in 1698, is considered the founder of Hasidic Judaism. In 1628, the Czech educator John Amos Comenius took refuge in the Commonwealth after Protestants were persecuted under the Counter-Reformation. The Commission for National Education, formed in 1773, was the first national Ministry of Education in the world. In the arts, a uniquely Commonwealth form known as coffin portraits, painted on metal sheets fixed to the front of a coffin, served as the defining visual tradition of the Sarmatian period, with no comparable practice found elsewhere in Europe except in Roman Egypt. Sigismund III brought Italian composers to the royal orchestra, including Luca Marenzio, Annibale Stabile and Marco Scacchi. The town of Zamość, designed by the Italian architect Bernardo Morando as an ideal city and founded by Chancellor Jan Zamoyski, stands as the most ambitious example of the Commonwealth's architectural ambitions. The marriage of Marie Leszczyńska to Louis XV of France in 1725 carried Polish aesthetic influence directly into the Palace of Versailles, where the polonaise dress and the Polish-style draped bed became fashionable among the French aristocracy.

• 8. The Constitution and the End

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  On the 3rd of May 1791, the Commonwealth enacted a constitution that Norman Davies calls the first modern codified constitution in European history. It abolished the liberum veto, banned confederations of nobles, established a separation of powers, extended political rights to the bourgeoisie and increased the rights of the peasantry. It came after the Commission of National Education of 1773, after Virtuti Militari, the oldest military decoration still in use, ordered by Stanisław August Poniatowski in 1792, and after years of attempted reform blocked at every turn by foreign interference and internal veto. Catherine the Great called the constitution Jacobinical. Grigori Potemkin drafted the act for the Targowica Confederation, describing it as a "contagion of democratic ideas." Prussian minister Ewald Friedrich von Hertzberg called it a blow to the Prussian monarchy. All three neighbouring powers had been content to tolerate a weak Poland as a buffer state; a reforming Poland was a different matter. Russia, Prussia and Austria partitioned the Commonwealth in three stages. By 1795, it was erased from the map of Europe. Poland and Lithuania were not re-established as independent countries until 1918. The Duchy of Warsaw, established by Napoleon Bonaparte in 1807, traced its origins to the Commonwealth, and Józef Piłsudski's vision in the 1920s of a Polish-led federation stretching from Finland to the Balkans was one more attempt to reconstruct what the partitions had destroyed.