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, Czech Tĕšín, Pol. Cieszyn, former principality (c.850 sq mi/2,200 sq km), now divided between the Czech Republic and Poland. Teschen was its chief town.
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a city in Poland, in Bielsko-Biala Województwo, on the Olza (Olše) River, opposite the Czechoslovak city of Český Těšin. Population, 31,400 (1976). Industry includes metalworking, food processing, and the manufacture of knitwear, leather haberdashery, and electrical equipment.