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.
Polish People's Party &quot;Piast&quot; (1913–31)
PSL Piast was an important political party in the Second Polish Republic. It was created in 1913 and, after Poland regained independence in 1918, it formed a part of several governments, most notably after the Lanckorona Pact and in the Chjeno-Piast coalition. In 1931 it formed the People's Party. Its major politicians included Wincenty Witos, Jakub Bojko, Jan Dąbski, Maciej Rataj and Władysław Kiernik.