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Thionville(tyôNvēl`), Ger. Diedenhofen, town (1990 pop. 40,835), Moselle dept., NE France, in Lorraine. It is a center for metallurgical and chemical industries. The town was a favorite of Charlemagne. In the testament of Thionville (806) Charlemagne divided his kingdom among his sons. After being captured by the Prussians in 1870, the town remained German until 1919.
a city in northern France, in the department of Moselle. Population, 37,000 (1968). A landing on the Moselle River and a railroad junction, Thionville is the center of one of the main ironore and metallurgical regions (Metz-Thionville) of Lorraine. Industries include metallurgy, machine building, metalworking, and the production of chemicals.