BADEN, a spa in Lower Austria, 17m. south of Vienna, beau tifully situated at the foot of the Wiener Wald, where it is pierced by the romantic Helenental. The warm. springs (72° F-97° F), from which its name and existence are derived, possess radioactive properties and have a high content of sulphate of lime. They are 14 in number, rising for the most part at the foot of the Cal varienberg (I,o7oft.), a mass of dolomitic limestone, and are used for bathing. Most of the baths are in the old town where, too, are found the Rathaus, the parish church, a fine example of late Gothic architecture, dating from the end of the 15th century, and many fine monuments. West of the old town lie several fine parks and the Rollett museum, rich in local prehistoric and Roman finds. Evidences of a continuous settlement since early times are also to be seen in the old town, and Baden appears to have main tained its present function through the ages. Pop. ( 1934), See J. Schwarz, Die Heilquellen von Baden bei Wien (1900) .