Polish People's Republic
The Polish People's Republic (, ) was a state in Central Europe that existed from 1947 to 1989, and the predecessor of the modern democratic Republic of Poland. With a population of approximately 37.9 million inhabitants near the end of its existence, it was the most populous state of the Eastern Bloc after the Soviet Union. Having a unitary Marxist–Leninist communist government, it was also one of the main signatories of the Warsaw Pact. The official capital since 1947 and largest city was Warsaw, followed by industrial Łódź and cultural Kraków.
Supreme People's Council (Prussian Poland)
The Supreme People's Council () was a political organization in the Prussian Partition of Poland, which played a major role during the Greater Poland Uprising (1918–19). It was established in 1916 in Poznań as an underground Interparty Committee (Komitet Międzypartyjny), also known as the Central Citizen's Committee (Centralny Komitet Obywatelski). After the World War I armistice, the committee renamed itself to the People's Council and later to the Supreme People's Council. The Council self-disbanded on August 19, 1919, when the power in the area was transferred to the re-united Second Polish Republic.