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Västerås(vĕs'tərōs`), city (1990 pop. 98,303), capital of Västmanland co., E Sweden, a port on Lake Mälaren at the mouth of the Svartån River. It is the main center of the Swedish electrical goods industry; other manufactures include metal goods, textiles, and glass. Founded by 1100, Västerås was one of Sweden's great medieval cities, with a cathedral (13th cent.) and a fortified castle (14th cent.). Eleven important diets convened there, notably the Västerås Recess (1527), which created the Lutheran state church, and the diet of 1544, which made the Swedish throne hereditary.
a city in central Sweden; a port on Lake Mälaren. Administrative center of Västmanland Län (county). Population, 111,000(1969).
Västerås is one of Sweden’s largest industrial centers. Its electrotechnical industry produces 15 percent of the country’s output, and there are ASEA factories in the city. Västerås also produces reactors for atomic power plants and rolled nonferrous metal. There is a steam electric power plant in the city.