"CCCP" is Latin graphical rendition of the Russian acronym for the Soviet Union, reading as "Soyúz Sovétskikh Sotsialistícheskikh Respúblik" (SSSR) or "The Union of Soviet Socialist Republics". Commonly known as the Soviet Union (Sovétsky Soyúz), it was a state in much of the northern region of Eurasia that existed from 1922 until 1991. The list of republics in the Soviet Union varied over the time. In its final years it consisted of 15 Soviet Socialist Republics (S.S.R.'s). Russia was by far the largest Republic in the Soviet Union, dominating in nearly all respects: land area, population, economic output, and political influence. The territory of the Soviet Union also varied, and in its most recent times approximately corresponded to that of the late Imperial Russia, with notable exclusions of Poland and Finland. The political organization of the country was defined by the only recognized political party, the Communist Party of the Soviet Union.: