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Sondershausen(zôn'dərs-hou`zən), commune (1994 pop. 22,370), Thuringia, central Germany, near the western foot of Kyffhäuser Mt. It is an industrial city and a potash-mining center. Manufactures include textiles, clothing, and paper. Nearby are petroleum deposits. From the late 16th cent. until 1918 Sondershausen was the capital of the principality of Schwarzburg-Sondershausen. There is a notable palace (16th–18th cent.) in the city.
a city in the German Democratic Republic on the unnavigable Wipper River in the Erfurt District. Population, 22,900 (1970). Sondershausen is a center for the electrotechnical industry. Potassium salt is mined near the city; the Gliikauf Potassium Plant (with 3,200 employees in 1965) is located in Sondershausen.