Silesia
The Sudeten Mountains run along the southern edge of Silesia, creating a rugged border that contrasts with the flat lands to the north. This range extends into the Carpathian Mountains at the region's southeastern extreme near the Silesian Beskids. The Oder River flows through the heart of the territory, serving as a central artery for trade and transport since ancient times. Tributaries like the Bóbr, Kwisa, and Nysa Kłodzka branch off from the main waterway, carving valleys through the landscape. In 1997, 2010, and 2024, these rivers caused severe flooding that affected communities across Poland, Germany, and the Czech Republic. The mountainous areas in the south offer significant tourism destinations such as Karpacz, Wisła, and Szczyrk. Local populations value the greenery found here because it provides a stark contrast to the heavily industrialized zones nearby.
In the fourth century BC, Celtic tribes entered Silesia through the Kłodzko Valley and settled around Mount Ślęża. These early inhabitants established communities near modern cities including Wrocław, Oława, and Strzelin. By the first century BC, Germanic Lugii tribes appeared within the region. West Slavs and Lechites arrived around the seventh century, stabilizing their settlements by the ninth century. Local groups constructed boundary structures known as the Silesian Przesieka and the Silesia Walls. Their eastern border lay west of Bytom and east of Racibórz and Cieszyn. East of this line lived the Vistulans, while the Western Polans tribe dwelt north of the Barycz River valley. The name Ślęża likely derives from Old Polish words meaning dampness or moisture, reflecting the area's cult status for pagans before Christianization.
Mieszko I of the Piast dynasty incorporated Silesia into the newly established Polish state during the tenth century. In 1000, the Diocese of Wrocław became the oldest Catholic diocese in the region under the Roman Catholic Archdiocese of Gniezno. Poland repulsed German invasions at Niemcza in 1017 and again at Głogów in 1109. Following the fragmentation of Poland in the twelfth century, the territory divided into smaller duchies ruled by various lines of the Piast dynasty. Duke Henry the Bearded invited Walloon immigrants to settle in Wrocław starting in the early thirteenth century. He also granted municipal privileges to towns like Złotoryja, creating a model for future local governments. The Book of Henryków contains the earliest known sentence written in the Polish language. Between 1289 and 1292, Bohemian king Wenceslaus II gained suzerainty over some Upper Silesian duchies. Polish monarchs did not renounce their hereditary rights until 1335.
King Frederick II of Prussia seized most of Silesia from Austria in 1742 during the War of the Austrian Succession. Breslau became one of Germany's largest cities after the province was established as a Prussian entity in 1815. The city served as a center for Jewish life, scientific research, and locomotive manufacturing. Coal mining began in the middle of the eighteenth century and grew steadily while Silesia remained part of Germany. By 1979, the region produced record tonnage under the People's Republic of Poland. The Upper Silesian Coal Basin covers about 6,000 square kilometers and contains 41 active mines. In 2008, an estimated 35 billion tonnes of lignite reserves were discovered near Legnica. Iron ore has been mined since the fourth century BC alongside lead, copper, silver, and gold. Zinc, cadmium, arsenic, and uranium deposits also exist throughout the upland areas. Lower Silesia features large-scale copper processing between Legnica, Głogów, Lubin, and Polkowice.
Polish Silesia was among the first regions invaded by Germany in 1939 when World War II began. Nazi German occupation targeted Jews and ethnic Poles for extermination through expulsions, mass murder, and deportation to concentration camps. Einsatzgruppe z. B.V. led by Udo von Woyrsch and Einsatzgruppe I led by Bruno Streckenbach conducted executions across the province. Between May 5 and the 17th of June 20,000 Silesian Jews were sent to Birkenau gas chambers. During August 1942, another 10,000 to 13,000 Silesian Jews were murdered at Auschwitz. The region housed the Gross-Rosen concentration camp and numerous prisoner-of-war camps including Stalag VIII-A, Stalag VIII-B, and Stalag VIII-C. Two thousand Polish intellectuals, politicians, and businessmen were murdered in 1940 as part of a Germanization program. Silesia also contained one of two main centers where medical experiments were conducted on kidnapped Polish children.
The Potsdam Conference of 1945 defined the Oder-Neisse line as the border between Germany and Poland pending a final peace treaty that never occurred. From June 1945 to January 1947, 1.77 million Germans fled or were expelled from Lower Silesia alone. Another 310,000 people left Upper Silesia during this period. Nearly all 4.5 million Silesians of German descent fled or were interned in camps by 1946. Some thousand German Jews who survived the Holocaust returned only to be expelled again. The population of Głogów fell from 33,500 to just 5,000 after these transfers. Wrocław lost 25 percent of its residents between 1939 and 1966. Repopulation attempts failed throughout the 1940s and 1950s until the late 1970s when numbers finally recovered. New settlers came from former Eastern Borderlands annexed by the Soviet Union and from Central Poland. Refugees from Lwów helped repopulate parts of Wrocław.
Today's largest part of Silesia lies within Poland where it is often cited as one of the most diverse regions in the country. The United States Immigration Commission published a Dictionary of Races or Peoples in 1911 that considered Silesian a geographical term rather than an ethnic one. Both Polish Silesian and German Silesian dialects exist in the region. The last Polish census of 2011 showed Silesians are the largest ethnic minority while Germans rank second. Most German speakers live in Upper Silesia but their numbers have declined significantly since World War II. The Lower Silesian German dialect nears extinction due to speaker expulsions. The Silesian language remains spoken by a minority in Upper Silesia with ongoing debate about whether it constitutes a separate language or a Polish dialect. Catholics make up the majority of today's population after Protestants were largely expelled during the postwar period. Religious demographics shifted drastically as Poles, who were mostly Catholic, resettled areas previously inhabited by Germans.
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Common questions
What geographical features define the borders of Silesia?
The Sudeten Mountains run along the southern edge of Silesia and extend into the Carpathian Mountains near the Silesian Beskids. The Oder River flows through the heart of the territory while tributaries like the Bóbr, Kwisa, and Nysa Kłodzka carve valleys through the landscape.
When did Celtic tribes first enter the region known as Silesia?
Celtic tribes entered Silesia through the Kłodzko Valley in the fourth century BC and settled around Mount Ślęża. These early inhabitants established communities near modern cities including Wrocław, Oława, and Strzelin before Germanic Lugii tribes appeared by the first century BC.
Who seized control of Silesia from Austria during the War of the Austrian Succession?
King Frederick II of Prussia seized most of Silesia from Austria in 1742 during the War of the Austrian Succession. Breslau became one of Germany's largest cities after the province was established as a Prussian entity in 1815.
How many Silesian Jews were sent to Birkenau gas chambers between May 5 and June 17 1942?
Between May 5 and the 17th of June 1942, 20,000 Silesian Jews were sent to Birkenau gas chambers. During August 1942, another 10,000 to 13,000 Silesian Jews were murdered at Auschwitz while the region housed the Gross-Rosen concentration camp.
What happened to the population of Lower Silesia following the Potsdam Conference of 1945?
From June 1945 to January 1947, 1.77 million Germans fled or were expelled from Lower Silesia alone. The population of Głogów fell from 33,500 to just 5,000 after these transfers while Wrocław lost 25 percent of its residents between 1939 and 1966.