Template:Wp-Masovia-History

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When the Slavs came to this region from the surrounding area of Polesie, they mingled with the descendants of Vistula Veneti and with other people who had settled here such as the Wielbark people. This created a Lechitic tribe: Mazovians.

The historical region of Mazovia (Mazowsze) in the beginning encompassed only the territories on the right bank of Vistula near Płock and had strong connections with Greater Poland (through Włocławek and Kruszwica). In the period of the rule of the first Polish monarchs of the Piast dynasty, Płock was one of their seats, and on the Cathedral Hill (Wzgórze Tumskie) they raised palatium. In the period 1037–1047 it was the capital of the independent, Mazovian state of Masław. Between 1079 and 1138 this city was de facto the capital of Poland. Since 1075 it has been the seat of the Diocese of Płock encompassing northern Mazovia; the south formed the archdeaconate of Czersk belonging to Poznań, and the Duchy of Łowicz was part of the Archdiocese of Gniezno (this division remained as long as until the Partitions of Poland).

During the 9th century Mazovia was perhaps inhabited by the tribe of Mazovians, and it was incorporated into the Polish state in the second half of 10th century under the Piast ruler Mieszko I. As a result of the fragmentation of Poland after the death of Polish monarch Bolesław III Wrymouth, in 1138 the Duchy of Mazovia was established, and during the 12th and 13th centuries it joined temporarily various adjacent lands and endured invasions of Prussians, Yotvingians, and Ruthenians. To protect its northern section Conrad I of Mazovia called in the Teutonic Knights in 1226 and granted them the Chełmno Land.

After the reunification of the Polish state by Władysław I in the early 14th century, Mazovia became its fief in 1351. In the second half of 15th century western Mazovia and in 1526/1529 the main part (with its capital in Warsaw) was incorporated into the Polish state. In the 15th century the eastern part of the region (Łomża) was settled, mainly by the yeomanry (drobna szlachta). Mazovia was considered underdeveloped in comparison with Greater Poland and Lesser Poland, with the lowest urban population.

In the Early Modern Times Mazovia was known for exporting grain, timber, and fur. It was also distinct because there was no reformation here. Mazovia was divided into three voivodeships, each of them divided into lands, each of them divided into counties and all three voivodeships formed part of the larger Greater Poland Province of the Polish Crown. The Polish-Lithuanian Union of Lublin (1569) established Mazovia as the central region of the Polish–Lithuanian Commonwealth, with Warsaw rising to prominence as the seat of the state legislature (sejm). In 1596 King Sigismund III Vasa moved the Polish capital from Kraków to Warsaw. During the 17th and 18th centuries Swedish, Transylvanian, Saxon, and Russian invasions wreaked havoc on the region.

In 1793 western Mazovia, and two years later the rest of the region were annexed by the Kingdom of Prussia in the Second and Third Partitions of Poland, while the south-eastern portion was annexed by Austria. In 1807 it became part of the Duchy of Warsaw. In 1815 the region was incorporated into the Congress Kingdom of Poland, which was dependent on Russia. In the 19th century Mazovia was the site of large Polish uprisings (November Uprising and January Uprising) against Russian rule. In that era pre-partition Mazovia was divided among Warsaw, Płock and Augustów (the last one replaced later by Łomża).

Since 1918 Mazovia has been a part of the resurrected Poland, being roughly equivalent to the Warsaw Voivodeship. Under the German occupation during World War II, the population was subjected to mass arrests, executions, expulsions and deportations to forced labour, Nazi concentration camps and Nazi ghettos. Numerous sites were looted. The large Palmiry massacres were carried out in the village of Palmiry near Warsaw. It is one of the most infamous sites of Nazi German crimes against Poles. The population of Warsaw decreased sharply as a result of executions, the extermination of the city's Jews, the deaths of some 200,000 inhabitants during the Warsaw Uprising of 1944, and the deportation of the city's left-bank population following the uprising. Shortly after the uprising, Adolf Hitler ordered German troops to destroy the city. The rebuilding of the Polish capital was the main task of the postwar period. Those times Warsaw Voivodeship was still roughly similar to historical Mazovia and used to be informally called so, but in 1975 it was divided into several little voivodeships. However, in 1999 Mazovian Voivodeship was created as one of 16 administrative regions of Poland.