DUISBURG, a town in the Prussian Government district (Regierungsbezirk) of Dusseldorf, Germany. It is situated at the junction of the Rhine and the Ruhr, 15 m. N. (by rail) of Dils seldorf. . Pop. (1885) 5) 274,199. Duisburg was known to the Romans as Castrum Deutonis and under the Frank ish kings as Dispargum. In the 12th century it attained the rank of an imperial free town; but in the 17th century it was acquired by Brandenburg. Of the many churches in the town, the fine Gothic Salvatorkirche (15th century) is the most interesting. The town is well provided with educational facilities; of the technical schools, the school of machinery is important. In 1655, the elector Frederick William of Brandenburg founded a Protestant univer sity, which flourished until 1802. The great development of indus try on the Rhine, has made Duisburg into a large industrial town, the increase in population being indicated above. Its chief indus tries are connected with metallurgical manufactures; in addition it has important chemical, textile, tobacco, sugar, soap, margarine and plate-glass works, as an entrepot for the industries of the Ruhr area it exports large quantities of coal. The port—one of the largest inland ports of Europe—covers an area of 632 hectares. The Rhine-Herne canal connects Duisburg with Dortmund and by way of the Dortmund-Ems canal, with German North Sea ports. It is also an important railway centre. Duisburg was occupied by the Belgians from March 8, 1921 to Aug. 25, 1925 as a sanction under the Treaty of Versailles.