First Sejm of King Stanisław August Poniatowski. Ordinary Sejm in Warsaw. 1766 r.
The Sejm was convened in June, while the pre-sejm sejmiks were held in August 1766. The proceedings began on 6 October 1766. The Speaker of the Parliament was elected Celestyn Czaplica, the Chamberlain of of Łuck. During the Sejm, the royal court tried to carry out fiscal reforms, which were to be voted by a majority of votes. However, they were sabotaged by Russian and Prussian intrigues, influencing the behaviour of parliamentary groups. Religious matters, which were used by foreign courts as an instrument for conflicting society, gained significant importance. The Sejm concluded its proceedings on 29 November 1766.
See: R. Łaszewski, Sejm polski w latach 1764-1793. Studium historyczno-prawne [The Polish Sejm in the years 1764-1793. Historical and legal study], Warszawa 1975; W. Konopczyński, Dzieje Polski nowożytnej [The History of Modern Poland], v. 2, Warszawa 1986; J. Michalski, Sejm w czasach panowania Stanisława Augusta [The Sejm during the reign of Stanisław August], in: Historia sejmu polskiego [The History of the Polish Sejm], v. 1, Warszawa 1984, red. J. Michalski, s. 350-419; Z. Zielińska, Sejmy polskie z lat 1764-1786 [Polish Sejms of 1764-1786], Warszawa 1995; Z. Zielińska, Polska w okowach „systemu północnego”. 1763-1766 [Poland in the grip of the "northern system". 1763-1766], Kraków 2012. Legislation see: Volumina legum, Edited by J. Ohryzko, v. 7, Petersburg 1860, p. 436-550.