History of Poland
The Polish People's Republic ("Polska Rzeczpospolita Ludowa") was established under the rule of the communist Polish United Workers' Party (PZPR). The name change from the Polish Republic was not officially adopted, however, until the proclamation of the Constitution of the Polish People's Republic in 1952.
Legislative Sejm (Second Polish Republic)
The Legislative Sejm was formed in the aftermath of World War I on the territories of the newly independent Second Polish Republic. In late 1918 Polish state was governed by Józef Piłsudski, who quickly begun the work to organize election to the first Polish national parliament (Sejm) since the Grodno Sejm of 1793, held two years before partitions of Poland ended the independent existence of the Polish-Lithuanian Commonwealth.