EISENBERG (Isenberg), a town of Germany, in the Land of Thuringia on a plateau between the rivers Saale and Elster 20 M. S.W, from Zeitz. Pop. (1933) 11,371. It possesses an old castle and several churches. Its principal industries are metal working and the manufacture of machines, photographic plates, toys, ovens, furniture, pianos, porcelain and sausages.