Polish-Lithuanian Commonwealth(redirected from Commonwealth of Poland)
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(in Polish, Rzeczpospolita), the traditional name of the Polish state from the late 15th century through the 18th. The Polish-Lithuanian Commonwealth was a specific type of monarchy subject to influence from the estates and headed by a king elected by the Sejm. From the time of the Union of Lublin of 1569 until 1795, this was the official name of the Polish-Lithuanian state.