Polish–Lithuanian Commonwealth

The Polish–Lithuanian Commonwealth was one of the largest and most populous states in early modern Europe, a unique federal monarchy distinguished by its exceptional religious tolerance and its powerful tradition of noble self-government.

It was created by the Union of Lublin in 1569, which transformed the existing dynastic union between the Kingdom of Poland and the Grand Duchy of Lithuania, in place since 1386, into a single integrated state with a common elected monarch, parliament, and foreign policy, while preserving distinct laws and armies. The Commonwealth was governed under a system sometimes called a 'noble democracy' or 'Golden Liberty,' in which the szlachta (nobility), a remarkably large class, elected the king, dominated the legislative Sejm, and jealously guarded their privileges. This included the notorious liberum veto, which allowed a single deputy to block legislation and dissolve sessions. The state was strikingly diverse, encompassing Poles, Lithuanians, Ruthenians (Ukrainians and Belarusians), Germans, Jews, Armenians, and others, and for its era it offered notable protections for religious minorities, including a large Jewish population. At its height in the early seventeenth century the Commonwealth was a major power, defeating Russia, Sweden, and the Ottomans, and its king John III Sobieski famously led the relief of Vienna against the Ottomans in 1683. From the mid-seventeenth century, however, the state was weakened by devastating wars, including the catastrophic Swedish 'Deluge,' Cossack uprisings, and the paralysis of central government through the abuse of the liberum veto and the growing power of magnate factions. As the Commonwealth grew politically dysfunctional and militarily weak, its powerful neighbours, Russia, Prussia, and Austria, intervened in its affairs and carried out three successive partitions of its territory in 1772, 1793, and 1795. The third partition in 1795 erased the Commonwealth entirely from the map, ending Polish and Lithuanian statehood for more than a century.

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