Prowincja
A prowincja was the largest territorial subdivision in medieval and Renaissance-era Poland, and later in the Polish-Lithuanian Commonwealth. The term designated each of the two largest constituents of the state: depending on the period, including Wielkopolska, Małopolska and the Grand Duchy of Lithuania. Ducal Prussia was often counted as part of the Greater Poland; Inflanty as part of the Grand Duchy of Lithuania, and the Ruthenian territories were split between Lesser Poland and the Grand Duchy.
Though larger than a voivodeship, the prowincja was less important in terms of offices and power. In most respects, it was merely a titular unit of administration. The real power lay with the voivodeship—and, to a lesser extent, with ziemias.
Occasionally the term voivodeship will be misleadingly translated into English as a province, leading to potential confusion.
The Polish term "prowincja" has not been used to denote any part of independent Poland since the Third Partition of the Polish-Lithuanian Commonwealth —unlike "ziemia", which has continued to be used for certain geographical areas. Since 1795, the Polish word "prowincja" has been used only for certain foreign-imposed units of administration within territories of the old Polish-Lithuanian Commonwealth.