Wars, politics & history

Union of Lublin

1 July 1569

The Union of Lublin joined the Kingdom of Poland and the Grand Duchy of Lithuania into a single state, the Polish-Lithuanian Commonwealth, with a common ruler elected by the nobility and a joint parliament, the Sejm. The two countries had been linked by a dynastic union since 1386, but the Lithuanians feared Polish domination, while pressure from Muscovy, which was waging the Livonian War, made a closer arrangement attractive. Ukrainian lands were transferred from Lithuania to the Polish crown. The Commonwealth became one of the largest states in Europe and had a unique system of noble democracy, lasting until its partitions in the late eighteenth century.

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