When was the Polish-Lithuanian Commonwealth created?

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Map showing Poland's territory in 1634 under the reign of Wladyslaw IV Vasa, shaded in pink and spanning from the Baltic Sea in the north to near Kyiv in the southeast. Major present-day cities such as Warsaw, Krakow, Gdansk, Vilnius, Minsk, Lwow (Lviv), Pinsk, and Kyiv are marked within the territory, with surrounding cities like Moscow, Riga, Vienna, and Budapest shown for reference. — Polish-Lithuanian Commonwealth Poland's territory in 1634, during the reign of Władysław IV Vasa.

The Polish-Lithuanian Commonwealth was created on July 1, 1569, through the Union of Lublin.12

This pact united the Kingdom of Poland and the Grand Duchy of Lithuania into a single, federated state. The union was established to ensure a more complete political integration between the two nations, which had previously been linked only by a personal union under the same sovereign. Following the agreement, the two countries functioned as distinct but equal components of a single body politic, sharing a jointly selected sovereign and participating in a joint Diet.13