Fast-called Sejm in quiet times. The ordinary Sejm in Warsaw. 1641.
The Sejm convening call was made in June, and the smaller local assemblies took place through July 1641. The Sejm began its proceedings on August 20, 1641. Bogusław Leszczyński, a son of the Belz voivode, was elected Marshal of the Chamber of Deputies. The Sejm enacted a number of statutes, including on the demesne (domain) due to the King and on the King’s options to get counsel from all of the senators near him. The Deputies also addressed some questions of the judiciary, but postponed tax issues to the next session. The Sejm wound up its proceedings on 4 October 1641.
See: A. S. Radziwiłł, Pamiętnik o dziejach w Polsce (Memoir of history in Poland), vol. 2, 1637-1646, Translated and edited by A. Przyboś and R. Żelewski, Warsaw 1980, pp. 252-271; W. Czapliński, Sejm w latach 1587-1696 (Sejm in the years 1587-1696), in: Historia sejmu polskiego (History of the Polish Sejm), vol. 1, Warsaw 1984, edited by J. Michalski, pp. 217-299; E. Opaliński, Sejm srebrnego wieku 1587-1652. Między głosowaniem większościowym a liberum veto (Sejm of the silver age 1587-1652. Between the majority vote and the liberum veto), Warsaw 2001. Ustawodawstwo (Legislation), see Volumina Constitutionum, Vol. 4, part. 1, edited for print by S. Grodziski, Marcin Kwiecień, K. Fokt, Preface by W. Uruszczak, Warsaw 2015, pp. 11-121.