Mazovia

Mazovia (məzō`vēə) or Masovia (məsō`–) Pol. Mazowsze, historic region, central Poland. At the death (1138) of Boleslaus III, Mazovia became an independent duchy under the Piast dynasty. It became a suzerainty of Great Poland in 1351 and was finally united with it in 1526. Mazovia passed to Prussia during the 18th-century partitions of Poland and was later a part of the Russian Empire. It reverted to Poland in 1918.

---

Mazovia 

(Polish Mazowsze), a historical region of Poland, located along the middle reaches of the Vistula River and the lower courses of the Narew and Bug rivers. It took its name from a Polish tribe, the Mazovians, who settled here between the ninth and llth centuries. During the tenth century Mazovia was an independent principality. Beginning in the mid-13th century it was divided into small feudal appanages, which between the 14th and 16th centuries gradually came under the rule of the Polish kings, a process that was completed in 1526. From the 16th to the 18th century Mazovia was divided into the Rawa, Plock, and Mazowieckie województwos (provinces). The name “Mazovia” was also applied to the Mazowieckie Województwo.