The ineffective Sejm. Ordinary Sejm in Warsaw. 1639 r.
The Sejm was convened by King Władysław IV in April 1639. The pre-sejm sejmiks were held in a turbulent atmosphere in the face of the Turkish and Tatar threats, as well as the Swedish one in August 1639. The Sejm began its proceedings on 5 October 1639. Władysław Kierdey, a Grodno land writer, was elected Speaker of the Chamber of Deputies. The Sejm proceeded in a turbulent atmosphere, which led to the parting of the Sejm and the non-adoption of any constitution.
See: A. S. Radziwiłł, Pamiętnik o dziejach w Polsce [A memoir about the history of Poland], v. 2. 1637-1646, Translated and developed by A. Przyboś and R. Żelewski, Warszawa 1980, p. 161 et seq..; E. Opaliński, Sejm srebrnego wieku 1587-1652. Między głosowaniem większościowym a liberum veto [Sejm of the silver age 1587-1652. Between majority voting and liberum veto], Warszawa 2001; W. Czapliński, Sejm w latach 1587-1696 [Sejm in the years 1587-1696], in: Historia sejmu polskiego [The History of the Polish Sejm], v. 1, Warszawa 1984, edited by J. Michalski, p. 217-299.