What was the king whose mistress was Elżbieta Branicka criticized of as the last king of the Commonwealth?
Stanisław August Poniatowski: Stanisław II Augustus (also Stanisław August Poniatowski; born Stanisław Antoni Poniatowski; 17 January 1732 – 12 February 1798) was the last King of Poland, Grand Duke of Lithuania and the last monarch of the united Polish–Lithuanian Commonwealth (1764–95). Stanisław August Poniatowski:  He is criticized primarily for his failure to stand against the partitions, and thus to prevent the destruction of Poland.
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