What is "mazovia"

Mazovia is a historical region (dzielnica) in mid-north-eastern Poland. Borders of the Mazovian Voivodeship, which was created in 1999, do not reflect exactly its original shape (they do not include historically Mazovian Łomża and Łowicz, meanwhile include Lesser Polish Radom and Siedlce), but are roughly similar. Historical Mazovia existed since the Middle Ages until the partitions of Poland and consisted of three voivodeships with the capitals in Warszawa, Płock and Rawa Mazowiecka. In a narrower sense, the Mazovian Voivodeship was only the first of them (which however encompassed most of the region, only without the western lands). Between 1816 and 1844 another Mazovian Voivodeship (from 1837 Governorate) existed, encompassing the south of the region (along with Łęczyca Land and south-eastern Kujawy). In the Middle Ages the main city of the region was Płock, but in the Early Modern Times it lost importance in favour of Warsaw. Since 1138 Mazovia had a separate branch of the Piast dynasty and was incorporated to the Polish Crown as late as in the 15th and 16th centuries. As much as over 20% of Mazovian population was the yeomanry (drobna szlachta). Inhabitants of Mazovia are Mazurzy (in the singular: Mazur) – hence the region of Masuria, settled by them.