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TheConvocation Sejm of 1764 was aconfederatedconvocationsejm of thePolish–Lithuanian Commonwealth which met inWarsaw from 7 May to 23 June. It was tasked with preparing aroyal election to fill thethrone of the Commonwealth, but also carried out a series of reforms to the Commonwealth.
The Sejm was led bySejm marshal,Adam Kazimierz Czartoryski.Familia party ofCzartoryskimagnate family, backed by theRussian Empire (whose military forces were occupying parts of the Commonwealth) forced an election of their candidate (Stanisław August Poniatowski). In protest at the presence of Russian forces, and influence ofRussian ambassador to the Commonwealth,Herman Karl von Keyserling, many opposition deputies left the session - in the end the Sejm passed its decisions with only 80 deputies (out of 300) and 7 senators (out of 136). The Sejm approved the cession of the territory of the Commonwealth to Russia, made in theEternal Peace Treaty of 1686.[1]