REICHENAU, a town of Bohemia, in the circle and 9 miles E.S.E. of Königgrätz. It has an old and a new princely palace, the latter one of the finest buildings of Bohemia, with a valuable library and picture gallery; a Piarist college, gymnasium, and another school; manufactures of linen and woollen cloth, and an important market for corn. Pop. 4500.