Kothen, a German town on the Ziethe, in the duchy of Anhalt, and till 1853 the capital of a principality, 22 miles N. of Halle and 31 S.E. of Magdeburg. It consists of an old town which contains two palaces, one of them with a museum and library, and suburbs, and the cathedral has some old stained glass. The chief industries are iron-founding and agricultural-machine making, and the working of malt, sugar, lead, and spirits. Hahnemann established here an homoeopathic institution.