CONSTANCE, LAKE OF (Bodensee), after Lake Geneva the largest lake in the Alpine region, is on the north-east frontier of Switzerland, and is formed by the Rhine. Its north-west end divides into two arms, the Untersee (from Constance to Stein am-Rhein) and the tfberlingersee (running up to Ludwigshafen). From Bregenz to Stein-am-Rhein it is 461m. long and from Bregenz to Ludwigshafen 4o miles. Its surface is I,3o9ft. above sea-level, greatest width I o lm., and greatest depth 827 feet. The area of the lake is 2o4asq.m., part being in Switzerland (cantons of Thurgau and St. Gall), part in Austria, and small portions in Baden, Wurttemberg and Bavaria. For accounts of many ancient lake dwellings see H. Reinerth, Die jungere Steinzeit der Schweiz