Sejms, including their senate (the upper chamber), and sejmiks severely limited the king's powers.
Following the Constitution of 3 May 1791, the senate's competences were altered; in most cases, the senators could only vote together with the sejm, and the senate's veto powers were limited. Legislative power was limited to the deputies of the sejm (not senators voting separately, except on the senate's privilege of veto, a suspension of a given legislation until the sejm votes on it again during the next session). The king, who nominated senators, ministers and other officials, presided over the senate, and could propose new laws together with the executive government, over which he also presided (the newly created Straż Praw or the Guardianship of Laws). The sejm also had the supervisory role, as government ministers and other officials were to be responsible to it.
Reforms of 1764–66 improved the proceedings the sejm. They introduced majority voting for items declared as "non crucial" (most economic and tax matters) and outlawed binding instructions from sejmiks. Reforms of 1767 and 1773–75 transferred some competences of the sejm to the commissions of elected delegates. From 1768, hetmans were included among the senate members, and from 1775 also the Court Deputy Treasurer.
In the senate there was no voting; after all the senators who wished had spoken on a given matter, the king or the chancellor formed a general opinion based on the majority.
The sejm comprised two chambers, with varying numbers of deputies. After the 1569 Union of Lublin, the Kingdom of Poland was transformed into the federation of the Polish–Lithuanian Commonwealth and the numbers of sejm participants were significantly increased with the inclusion of the deputies from Lithuanian sejmiks. The deputies had no set term of office, although in practice it was about four months long, from their election at a regional sejmik, to their report on the next sejmik dedicated to hearing and discussing the previous sejm's proceedings (those sejmiks were known as relational or debriefing). Deputies had parliamentary immunity and any crimes against them were classified as lèse-majesté.
The Constitution of May 3 specified that the deputies were elected for two years, and did not require reelection in that period if any extraordinary sejms were to be called. Senators, for the most part, were selected by the king from a number of candidates presented by the sejmiks.
Due to population size differences between Lithuania and Poland, the Grand Duchy had three times less representatives than the Crown. Usually larger voivodeships could send 6 deputies, smaller 2; ziemias, depending on their sizes, would send 2 or 1. Numbers of deputies elected to the sejm by sejmiks from particular localities, in the order of precedence, based on a 1569 decree, were as follows:
The sejms in Warsaw were held in the Warsaw Castle, within the Chamber of Deputies (Hall of Three Pillars), with the upper Senate Chamber located literally above it. In the late 17th century, new quarters were constructed for the Chamber of Deputies, and were joined on the same level by the senate quarters in the mid-18th century. The new Senate Chamber was the larger of the two, as it was intended to host both chambers during the opening and closing ceremonies.
It is estimated that between 1493 and 1793 sejms were held 240 times. Jędruch gives a higher number of 245, and notes that 192 of those were successfully completed, passing legislation. 32 sejms were vetoed with the infamous liberum veto, particularly in the first half of the 18th century. The last two sejms of the Commonwealth were the irregular four-year Great Sejm (1788–92), which passed the Constitution of the 3 May, and the infamous Grodno Sejm (1793) where deputies, bribed or coerced by the Russian Empire following the Commonwealth defeat in the War in Defense of the Constitution, annulled the short-lived Constitution and passed the act of Second Partition of Poland.
In addition to the regular sessions of the general sejm, three special types of sejms handled the process of the royal election in the interregnum period. Those were:
Jędruch, who classifies the regular general sejm session as ordinary, in addition to the convocation, election and coronation sessions, also distinguished the following additional types:
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Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.221-222
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.221-222
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.104-106
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.221-222
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.221-222
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.104-106
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.310-312
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Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.293-294
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.293-294
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.293-294
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Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.104-106
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 57. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
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Koneczny, Feliks (1924). Dzieje administracji w Polsce w zarysie (in Polish). Vilnius: Okręgowa Szkoła Policji Państwowej Ziemi Wileńskiej. ISBN 83-87809-20-9. {{cite book}}: ISBN / Date incompatibility (help) 83-87809-20-9
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"Konstytucja: Sejm laws passed by common consent. They had various characters: that of today's laws, and that of administrative acts. They pertained to national, local and special matters. They appeared with the date of the opening of the [Sejm] session.... They were published in the name of the monarch, were written in the Polish language, and with time appeared in print. Tax laws were published separately. A collection of constitutions was published in the 18th century by Stanisław Konarski under the title, Volumina legum [Volumes of Laws – the first collection of laws in Poland: Encyklopedia Polski, p. 301]." Encyklopedia Polski, pp. 306–7. /wiki/Stanis%C5%82aw_Konarski
This is implicit in the May 3rd Constitution's recognition as the world's second written national constitution, after the United States Constitution, in many sources, including Encyklopedia Polski (p. 307) and Encyklopedia Powszechna PWN, vol. 2, Warsaw, Państwowe Wydawnictwo Naukowe, 1974, p. 543. /wiki/United_States_Constitution
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Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 54–55. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.220-221
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Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 90–100. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 90–100. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 90–100. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 90–100. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.104-106
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 51. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.104-106
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 125–132. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.219-220
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.219-220
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 125–132. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.310-312
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.310-312
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Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 125–132. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 125–132. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 427–431. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
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Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 74. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 74. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 74. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 125–132. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 74. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 71. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 76–77. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 74. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 76–77. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 125–132. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 78–79. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 125–132. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.226
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 125–132. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.226
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 74. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Juliusz Bardach, Boguslaw Lesnodorski, and Michal Pietrzak, Historia panstwa i prawa polskiego (Warsaw: Paristwowe Wydawnictwo Naukowe, 1987, p.226
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. p. 426. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4
Jacek Jędruch (1998). Constitutions, elections, and legislatures of Poland, 1493–1977: a guide to their history. EJJ Books. pp. 125–132. ISBN 978-0-7818-0637-4. Retrieved 13 August 2011. 978-0-7818-0637-4