Silesia

Silesia (, , ) is a historical region of Central Europe mostly in Poland, with small parts in the Czech Republic and Germany. Its area is approximately , and the population is estimated at around 8,000,000. Silesia is split into two main subregions, Lower Silesia in the west and Upper Silesia in the east. Silesia has a diverse culture, including architecture, costumes, cuisine, traditions, and the Silesian ethnolect (only in parts of Upper Silesia).
Silesia is along the Oder River, with the Sudeten Mountains extending across the southern border. The region contains many historical landmarks and UNESCO World Heritage Sites. It is also rich in mineral and natural resources, and includes several important industrial areas. The largest city and Lower Silesia's capital is Wrocław; the historic capital of Upper Silesia is Opole. The biggest metropolitan area is the Upper Silesian metropolitan area, the centre of which is Katowice. Parts of the Czech city of Ostrava and the German city of Görlitz are within Silesia's borders.
Silesia's borders and national affiliation have changed over time, both when it was a hereditary possession of noble houses and after the rise of modern nation-states, resulting in an abundance of castles, especially in the Jelenia Góra valley. The first known states to hold power in Silesia were probably those of Greater Moravia at the end of the 9th century and Bohemia early in the 10th century. In the 10th century, Silesia was incorporated into the early Polish state, and after its division in the 12th century it became a Piast duchy. In the 14th century, it became a constituent part of the Bohemian Crown Lands under the Holy Roman Empire, which passed to the Austrian Habsburg Monarchy in 1526. As a result of the Silesian Wars, the region was annexed by the German state of Prussia in 1742.
After World War I, the easternmost part of Upper Silesia was granted to Poland by the Entente Powers after insurrections by Poles and the Upper Silesian plebiscite. The remaining former Austrian parts of Silesia were partitioned to Czechoslovakia, forming part of Czechoslovakia's Sudetenland region, and are today part of the Czech Republic. In 1945, after World War II, most of Silesia was transferred to Polish jurisdiction by the Potsdam Agreement between the victorious Allies and became part of Poland, whose Communist government expelled most of Silesia's population. The small Lusatian strip west of the Oder–Neisse line, which had belonged to Silesia since 1815, remained in Germany.
As the result of the forced population shifts of 1945–48, today's inhabitants of Silesia speak the national languages of their respective countries. Previously German-speaking Lower Silesia has developed a new mixed Polish dialect and novel costumes. There is ongoing debate about whether the Silesian language should be considered a dialect of Polish or a separate language. The Lower Silesian German dialect is nearing extinction due to its speakers' expulsion.
Etymology.
The names of Silesia in different languages most likely share their etymology— ; ; ; ; ; ; ; Latin, Spanish and English: "Silesia"; ; ; ; ; ; . The names all relate to the name of a river (now Ślęza) and mountain (Mount Ślęża) in mid-southern Silesia, which served as a place of cult for pagans before Christianization.
"Ślęża" is listed as one of the numerous Pre-Indo-European topographic names in the region (see old European hydronymy). According to some Polonists, the name "Ślęża" or "Ślęż" is directly related to the Old Polish words "ślęg" or "śląg" , which means dampness, moisture, or humidity. They disagree with the hypothesis of an origin for the name "Śląsk" from the name of the Silings tribe, an etymology preferred by some German authors.
In Polish common usage, "Śląsk" refers to traditionally Polish Upper Silesia and today's Silesian Voivodeship, but less to Lower Silesia, which is different from Upper Silesia in many respects as its population was German-speaking until 1945–48.
History.
In the fourth century BC from the south, through the Kłodzko (Glatz) Valley, the Celts entered Silesia, and settled around Mount Ślęża near modern Wrocław, Oława and Strzelin. 
Germanic Lugii tribes were first recorded within Silesia in the 1st century. West Slavs and Lechites arrived in the region around the 7th century, and by the early ninth century, their settlements had stabilized. Local West Slavs started to erect boundary structures like the Silesian Przesieka and the Silesia Walls. The eastern border of Silesian settlement was situated to the west of the Bytom, and east from Racibórz and Cieszyn. East of this line dwelt a closely related Lechitic tribe, the Vistulans. Their northern border was in the valley of the Barycz River, north of which lived the Western Polans tribe who gave Poland its name.
The first known states in Silesia were Greater Moravia and Bohemia. In the 10th century, the Polish ruler Mieszko I of the Piast dynasty incorporated Silesia into the Polish state. During the Fragmentation of Poland, Silesia and the rest of the country were divided among many independent duchies ruled by various Silesian dukes. During this time, German cultural and ethnic influence increased as a result of immigration from German-speaking parts of the Holy Roman Empire. In 1178, parts of the Duchy of Kraków around Bytom, Oświęcim, Chrzanów, and Siewierz were transferred to the Silesian Piasts, although their population was primarily Vistulan and not of Silesian descent.
In 1241, after raiding Lesser Poland region, the Mongols invaded Europe and Silesia, causing widespread panic and mass flight. They looted much of the region and defeated the combined Polish and German forces under Henry II the Pious at the Battle of Legnica, which took place at Legnickie Pole near the Silesian city of Legnica. Upon the death of Orda Khan, the Mongols chose not to press forward further into Europe, but returned east to participate in the election of a new Grand Khan (leader).
Between 1289 and 1292, Bohemian king Wenceslaus II became "suzerain" of some of the Upper Silesian duchies. Polish monarchs had not renounced their hereditary rights to Silesia until 1335. The province became part of the Bohemian Crown under the Holy Roman Empire, and passed with that crown to the Habsburg Monarchy of Austria in 1526.
In the 15th century, several changes were made to Silesia's borders. Parts of the territories which had been transferred to the Silesian Piasts in 1178 were bought by the Polish kings in the second half of the 15th century (the Duchy of Oświęcim in 1457; the Duchy of Zator in 1494). The Bytom area remained in the possession of the Silesian Piasts, though it was a part of the Diocese of Kraków. The Duchy of Crossen was inherited by the Margraviate of Brandenburg in 1476, and with the renunciation of King Ferdinand I and the estates of Bohemia in 1538, became an integral part of Brandenburg.
In 1742, most of Silesia was seized by King Frederick the Great of Prussia in the War of the Austrian Succession, eventually becoming the Prussian Province of Silesia in 1815; consequently, Silesia became part of the German Empire when it was proclaimed in 1871.
After World War I, a part of Silesia, Upper Silesia, was contested by Germany and the newly independent Second Polish Republic. The League of Nations organized a plebiscite to decide the issue in 1921. It resulted in 60% of votes being cast for Germany and 40% for Poland. Following the third Silesian Uprising (1921), however, the easternmost portion of Upper Silesia (including Katowice), with a majority ethnic Polish population, was awarded to Poland, becoming the Silesian Voivodeship. The Prussian Province of Silesia within Germany was then divided into the provinces of Lower Silesia and Upper Silesia. Meanwhile, Austrian Silesia, the small portion of Silesia retained by Austria after the Silesian Wars, was mostly awarded to the new Czechoslovakia (becoming known as Czech Silesia and Zaolzie), although most of Cieszyn and territory to the east of it went to Poland.
Polish Silesia was among the first regions invaded during Germany's 1939 attack on Poland. One of the claimed goals of Nazi occupation, particularly in Upper Silesia, was the extermination of those whom Nazis viewed as subhuman, namely Jews and ethnic Poles. The Polish and Jewish population of the then Polish part of Silesia was subjected to genocide involving ethnic cleansing and mass murder, while Germans were settled in pursuit of "Lebensraum". Two thousand Polish intellectuals, politicians, and businessmen were murdered in the "Intelligenzaktion Schlesien" in 1940 as part of a Poland-wide Germanization program. Silesia also housed one of the two main wartime centers where medical experiments were conducted on kidnapped Polish children by Nazis.
The Potsdam Conference of 1945 defined the Oder-Neisse line as the border between Germany and Poland, pending a final peace conference with Germany which eventually never took place. At the end of WWII, Germans in Silesia fled from the battle ground, assuming they would be able to return when the war was over. However, they could not return and those who had stayed, were expelled and new Polish population from Central Poland, or themselves forcibly re-settled from the Soviet Union took their place. After 1945 and in 1946, nearly all of the 4.5 million Silesians of German descent fled, or were interned in camps and forcibly expelled, including some thousand German Jews who survived the Holocaust and had returned to Silesia.
The newly formed Polish United Workers' Party created a Ministry of the Recovered Territories that claimed half of the available arable land for state-run collectivized farms. Many of the new Polish Silesians who resented the Germans for their invasion in 1939 and brutality in occupation now resented the newly formed Polish communist government for their population shifting and interference in agricultural and industrial affairs.
The administrative division of Silesia within Poland has changed several times since 1945. Since 1999, it has been divided between Lubusz Voivodeship, Lower Silesian Voivodeship, Opole Voivodeship, and Silesian Voivodeship. Czech Silesia is now part of the Czech Republic, forming the Moravian-Silesian Region and the northern part of the Olomouc Region. Germany retains the Silesia-Lusatia region ("Niederschlesien-Oberlausitz" or "Schlesische Oberlausitz") west of the Neisse, which is part of the federal state of Saxony.
Geography.
Most of Silesia is relatively flat, although its southern border is generally mountainous. It is primarily located in a swath running along both banks of the upper and middle Oder (Odra) River, but it extends eastwards to the upper Vistula River. The region also includes many tributaries of the Oder, including the Bóbr (and its tributary the Kwisa), the Barycz and the Nysa Kłodzka. The Sudeten Mountains run along most of the southern edge of the region, though at its south-eastern extreme it reaches the Silesian Beskids and Moravian-Silesian Beskids, which belong to the Carpathian Mountains range.
Historically, Silesia was bounded to the west by the Kwisa and Bóbr Rivers, while the territory west of the Kwisa was in Upper Lusatia (earlier "Milsko"). However, because part of Upper Lusatia was included in the Province of Silesia in 1815, in Germany Görlitz, Niederschlesischer Oberlausitzkreis and neighbouring areas are considered parts of historical Silesia. Those districts, along with Poland's Lower Silesian Voivodeship and parts of Lubusz Voivodeship, make up the geographic region of Lower Silesia.
Silesia has undergone a similar notional extension at its eastern extreme. Historically, it extended only as far as the Brynica River, which separates it from Zagłębie Dąbrowskie in the Lesser Poland region. However, to many Poles today, Silesia ("Śląsk") is understood to cover all of the area around Katowice, including Zagłębie. This interpretation is given official sanction in the use of the name Silesian Voivodeship ("województwo śląskie") for the province covering this area. In fact, the word "Śląsk" in Polish (when used without qualification) now commonly refers exclusively to this area (also called "Górny Śląsk" or Upper Silesia).
As well as the Katowice area, historical Upper Silesia also includes the Opole region (Poland's Opole Voivodeship) and Czech Silesia. Czech Silesia consists of a part of the Moravian-Silesian Region and the Jeseník District in the Olomouc Region.
Natural resources.
Silesia is a resource-rich and populous region. Since the middle of the 18th century, coal has been mined. The industry had grown while Silesia was part of Germany, and peaked in the 1970s under the People's Republic of Poland. During this period, Silesia became one of the world's largest producers of coal, with a record tonnage in 1979. Coal mining declined during the next two decades, but has increased again following the end of Communist rule.
The 41 coal mines in Silesia are mostly part of the Upper Silesian Coal Basin, which lies in the Silesian Upland. The coalfield has an area of about 4,500 km2. Deposits in Lower Silesia have proven to be difficult to exploit and the area's unprofitable mines were closed in 2000. In 2008, an estimated 35 billion tonnes of lignite reserves were found near Legnica, making them some of the largest in the world.
From the fourth century BC, iron ore has been mined in the upland areas of Silesia. The same period had lead, copper, silver, and gold mining. Zinc, cadmium, arsenic, and uranium have also been mined in the region. Lower Silesia features large copper mining and processing between the cities of Legnica, Głogów, Lubin, and Polkowice.
The region is known for stone quarrying to produce limestone, marl, marble, and basalt. 
The region also has a thriving agricultural sector, which produces cereals (wheat, rye, barley, oats, corn), potatoes, rapeseed, sugar beets and others. Milk production is well developed. The Opole Silesia has for decades occupied the top spot in Poland for their indices of effectiveness of agricultural land use.
Mountainous parts of southern Silesia feature many significant and attractive tourism destinations (e.g., Karpacz, Szczyrk, Wisła). Silesia is generally well forested. This is because greenness is generally highly desirable by the local population, particularly in the highly industrialized parts of Silesia.
Demographics.
Silesia has been historically diverse in every aspect. Nowadays, the largest part of Silesia is located in Poland; it is often cited as one of the most diverse regions in that country. 
United States Immigration Commission in its "Dictionary of races or peoples" (published in 1911, during the period of intense immigration from Silesia to the USA) considered Silesian as a geographical (not ethnic) term, denoting the inhabitants of Silesia. It is also mentioned the existence of both Polish Silesian and German Silesian dialects in that region.
Ethnicity.
Modern Silesia is inhabited by Poles, Silesians, Germans, and Czechs. Germans first came to Silesia during the Late Medieval Ostsiedlung. The last Polish census of 2011 showed that the Silesians are the largest ethnic or national minority in Poland, Germans being the second; both groups are located mostly in Upper Silesia. The Czech part of Silesia is inhabited by Czechs, Moravians, Silesians, and Poles. 
In the early 19th century the population of the Prussian part of Silesia was between 2/3 and 3/4 German-speaking, between 1/5 and 1/3 Polish-speaking, with Sorbs, Czechs, Moravians and Jews forming other smaller minorities (see Table 1. below).
Before the Second World War, Silesia was inhabited mostly by Germans, with Poles a large minority, forming a majority in Upper Silesia. Silesia was also the home of Czech and Jewish minorities. The German population tended to be based in the urban centres and in the rural areas to the north and west, whilst the Polish population was mostly rural and could be found in the east and in the south.
Ethnic structure of Prussian Upper Silesia (Opole regency) during the 19th century and the early 20th century can be found in Table 2.:
Austrian part of Silesia had a mixed German, Polish and Czech population, with Polish-speakers forming a majority in Cieszyn Silesia.
Religion.
Historically, Silesia was about equally split between Protestants (overwhelmingly Lutherans) and Roman Catholics. In an 1890 census taken in the German part, Roman Catholics made up a slight majority of 53%, while the remaining 47% were almost entirely Lutheran. Geographically speaking, Lower Silesia was mostly Lutheran except for the Glatzer Land (now Kłodzko County). Upper Silesia was mostly Roman Catholic except for some of its northwestern parts, which were predominantly Lutheran. Generally speaking, the population was mostly Protestant in the western parts, and it tended to be more Roman Catholic the further east one went. In Upper Silesia, Protestants were concentrated in larger cities and often identified as German. After World War II, the religious demographics changed drastically as Germans, who constituted the bulk of the Protestant population, were forcibly expelled. Poles, who were mostly Roman Catholic, were resettled in their place. Today, Silesia remains predominantly Roman Catholic.
Existing since the 12th century, Silesia's Jewish community was concentrated around Wrocław and Upper Silesia, and numbered 48,003 (1.1% of the population) in 1890, decreasing to 44,985 persons (0.9%) by 1910. In Polish East Upper Silesia, the number of Jews was around 90,000–100,000. Historically the community had suffered a number of localised expulsions such as their 1453 expulsion from Wrocław. From 1712 to 1820 a succession of men held the title Chief Rabbi of Silesia ("Landesrabbiner"): Naphtali ha-Kohen (1712–16); Samuel ben Naphtali (1716–22); Ḥayyim Jonah Te'omim (1722–1727); Baruch b. Reuben Gomperz (1733–54); Joseph Jonas Fränkel (1754–93); Jeremiah Löw Berliner (1793–99); Lewin Saul Fränkel (1800–7); Aaron Karfunkel (1807–16); and Abraham ben Gedaliah Tiktin (1816–20).
Consequences of World War II.
After the German invasion of Poland in 1939, following Nazi racial policy, the Jewish population of Silesia was subjected to Nazi genocide with executions performed by Einsatzgruppe z. B.V. led by Udo von Woyrsch and Einsatzgruppe I led by Bruno Streckenbach, imprisonment in ghettos and ethnic cleansing to the General Government. In their efforts to exterminate the Jews through murder and ethnic cleansing Nazi established in Silesia province the Auschwitz and Gross-Rosen camps. Expulsions were carried out openly and reported in the local press. Those sent to ghettos would from 1942 be expelled to concentration and work camps. Between 5 May and 17 June, 20,000 Silesian Jews were sent to Birkenau to gas chambers and during August 1942, 10,000 to 13,000 Silesian Jews were murdered by gassing at Auschwitz. Most Jews in Silesia were exterminated by the Nazis. After the war Silesia became a major centre for repatriation of the Jewish population in Poland which survived Nazi German extermination and in autumn 1945, 15,000 Jews were in Lower Silesia, mostly Polish Jews returned from territories now belonging to Soviet Union, rising in 1946 to seventy thousand as Jewish survivors from other regions in Poland were relocated.
The majority of Germans fled or were expelled from the present-day Polish and Czech parts of Silesia during and after World War II. From June 1945 to January 1947, 1.77 million Germans were expelled from Lower Silesia, and 310,000 from Upper Silesia. Today, most German Silesians and their descendants live in the territory of the Federal Republic of Germany, many of them in the Ruhr area working as miners, like their ancestors in Silesia. To smooth their integration into West German society after 1945, they were placed into officially recognized organizations, like the Landsmannschaft Schlesien, with financing from the federal West German budget. One of its most notable but controversial spokesmen was the Christian Democratic Union politician Herbert Hupka.
The expulsion of Germans led to widespread underpopulation. The population of the town of Glogau fell from 33,500 to 5,000, and from 1939 to 1966 the population of Wrocław fell by 25%. Attempts to repopulate Silesia proved unsuccessful in the 1940s and 1950s, and Silesia's population did not reach pre-war levels until the late 1970s. The Polish settlers who repopulated Silesia were partly from the former Polish Eastern Borderlands, which was annexed by the Soviet Union in 1939. The former German city of Breslau was partly repopulated with refugees from the formerly Polish city of Lwów.
Cities.
The following table lists the cities in Silesia with a population greater than 20,000 (2015).
Flags and coats of arms.
The emblems of Lower Silesia and Upper Silesia originate from the emblems of the Piasts of Lower Silesia and Upper Silesia. The coat of arms of Upper Silesia depicts the golden eagle on the blue shield. The coat of arms of Lower Silesia depicts a black eagle on a golden (yellow) shield.
Flags with their colors refer to the coat of arms of Silesia.