Wiesbaden (65), capital of Hesse-Nassau, a famous German watering-place, abounding in hot springs, 5 m. NW. of Mainz; has a number of fine buildings and fine parade grounds, picture-gallery, museum, and large library; is one of the best-frequented spas in Europe, and is annually visited by 60,000 tourists or invalids; it was famed for its springs among the old Romans.