Warmia in the context of "Olsztyn"

East Prussia (German: Ostpreußen [ˈɔstˌpʁɔɪ̯sn̩] ) was a province of the Kingdom of Prussia from 1772 to 1829 and again from 1878 (with the Kingdom itself being part of the German Empire from 1871); following World War I it formed part of the Weimar Republic's Free State of Prussia, until 1945. Its capital city was Königsberg (present-day Kaliningrad). East Prussia was the main part of the region of Prussia along the southeastern Baltic Coast.

The bulk of the ancestral lands of the Baltic Old Prussians were enclosed within the later province of East Prussia. During the 13th century, the native Prussians were conquered by the crusading Teutonic Knights. After the conquest they were gradually converted to Christianity. As a result of the medieval Ostsiedlung, Germans became the dominant ethnic group, while Poles and Lithuanians formed sizeable minorities. From the 13th century, the region of Prussia was part of the monastic state of the Teutonic Knights. After the Second Peace of Thorn in 1466 it became a part of the Kingdom of Poland, either directly (Warmia) or as a fief (remainder). In 1525, with the Prussian Homage, the territory became the Duchy of Prussia, a vassal duchy of Poland. It gained full sovereignty in 1657, when Poland renounced its feudal rights in the Treaty of Bromberg.

Warmian–Masurian Voivodeship is a voivodeship (province) in northeastern Poland. Its capital and largest city is Olsztyn. The voivodeship has an area of 24,192 km (9,341 sq mi) and in 2019 had a population of 1,425,967.

Warmian–Masurian Voivodeship was created on 1 January 1999 from the entire Olsztyn Voivodeship, the western half of Suwałki Voivodeship, and part of Elbląg Voivodeship, pursuant to the Polish local government reforms adopted in 1998. The province's name derives from two historic regions, Warmia and Masuria, although also parts of other regions are located within the province, i.e. of Chełmno Land, Powiśle, Mazovia, Bartia and Natangia.

Masuria (Polish: Mazury [maˈzurɨ] ; Masurian: Mazurÿ; German: Masuren [maˈzuːʁən] ) is an ethnographic and geographic region in northern and northeastern Poland, known for its 2,000 lakes. Masuria occupies much of the Masurian Lake District. Administratively, it is part of the Warmian–Masurian Voivodeship (administrative area/province). Its biggest city, often regarded as its capital, is Ełk. The region covers a territory of some 10,000 km which approximately 500,000 people inhabit.

Masuria is bordered by Warmia, Powiśle and Chełmno Land in the west, Mazovia in the south, Podlachia and Suwałki Region in the east, and Lithuania Minor in the north.

The former eastern territories of Germany (German: ehemalige deutsche Ostgebiete) refer to those territories east of the current eastern border of Germany, i.e. the Oder–Neisse line, which historically had been considered German and which were annexed by Poland and the Soviet Union after World War II. In contrast to the lands awarded to the restored Polish state by the Treaty of Versailles after World War I, the German territories lost with the post-World War II Potsdam Agreement were either almost exclusively inhabited by Germans before 1945 (the bulk of East Prussia, Lower Silesia, Farther Pomerania, and parts of Western Pomerania, Lusatia, and Neumark), mixed German–Polish with a German majority (the Posen–West Prussia Border March, Lauenburg and Bütow Land, the southern and western rim of East Prussia, Ermland, Western Upper Silesia, and the part of Lower Silesia east of the Oder), or mixed German–Czech with a German majority (Glatz). Virtually the entire German population of the territories that did not flee voluntarily in the face of the Red Army advance of 1945, was violently expelled to Germany, with their possessions being forcibly expropriated.

The ceding of the east German lands to Poland was done in large part to compensate Poland for losing the Kresy lands east of the Curzon line, a region that was annexed by the Soviet Union after the German invasion of Poland in 1939. This territory had large populations of Ukrainians, Belarusians and Lithuanians – the main ethnic groups of three of the western republics of the Soviet Union – and many towns that were primarily inhabited by Poles and Jews. The Jewish communities in this region were mostly exterminated in the Holocaust and the Polish communities were mostly expelled to the restored Polish state after World War II, the communist-ruled Polish People's Republic. Poles from the northern part of Kresy were primarily resettled in Pomerania and Poles from Galicia were primarily resettled in Silesia, e.g. the Ossolineum and the Jan Kazimierz University in Lwów were both relocated to Wrocław, the former Breslau.

Natangians or Notangians (Prussian: Notangi; Polish: Natangowie; Lithuanian: Notangai; German: Natanger) was a Prussian clan, which lived in the region of Natangia, an area that is now mostly part of the Russian exclave Kaliningrad Oblast, whereas the southern portion lies in the Polish Warmian-Masurian Voivodeship.

In the 13th century, when the Teutonic Knights began their crusade against the Prussians, some 15,000 people might have lived in the area between the Pregolya and Łyna rivers. The Natangian lands bordered with Sambia in the north, Warmia in the west and south, and Bartia in the southeast. They likely spoke a West Baltic language, now extinct, similar to Old Prussian language.

Podlachia, also known by its Polish name Podlasie (Polish: [pɔˈdlaɕɛ] ; Lithuanian: Palenkė; Belarusian: Падляшша, romanized: Padliashsha), is a historical region in north-eastern Poland. Its largest city is Białystok, whereas the historical capital is Drohiczyn.

Similarly to several other historical regions of Poland, e.g. Greater Poland, Lesser Poland, Mazovia, Pomerania, Silesia, Warmia, Podlachia possesses its own folk costumes, unique traditional architecture and cuisine. Between 1513 and 1795 it was a voivodeship with the capital in Drohiczyn. Now the part north of the Bug River is included in the modern Podlaskie Voivodeship with the capital in Białystok, whereas southern parts are located in the Masovian and Lublin Voivodeships.