a town of Prussia, province of Silesia, on the Bober, in the government and 48 miles N.W. of Liegnitz. It is strongly fortified, and entered by three gates. There is a large and handsome ducal palace, with fine parks, gardens, and hot-houses. There are one Protestant and five Roman Catholic churches here, also a Roman Catholic school. Woollen and linen cloth is manufactured; and there is an important trade in corn. The principality of Sagan, with an area of 420 square miles, and a population of 52,000, was sold in 1628 by the Emperor Ferdinand II. to Wallenstein; after whose death it passed to the princes of Lobkowitz, who sold it in 1785 to Duke Peter of Courland. This duke abdicated his sovereignty in 1795, retaining his titles and honours; and his second daughter was created duchess of Sagan in 1845. Pop. of the town, 8948.