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.
Prehistory and protohistory of Poland
The prehistory and protohistory of Poland can be traced from the first appearance of Homo species on the territory of modern-day Poland, to the establishment of the Polish state in the 10th century AD, a span of roughly 500,000 years.