Chiemsee, lake, Bavaria Land (state), southeastern Germany. It lies 1,699 feet (518 m) above sea level, between the Inn (to which it drains through the Alz) and Salzach rivers. The largest lake in Bavaria, it is 9 miles (15 km) long and 5 miles (8 km) wide, has an area of 32 square miles (82 square km), and contains three islands, Herreninsel, Fraueninsel, and Krautinsel. The lake’s shores are flat on the north and south and flanked by undulating hills to the east and west. The waters are clear and well stocked with trout and carp, but fishing is strictly regulated. The Herreninsel, the seat of a bishopric from 1215 to 1805, has a Benedictine monastery (founded 764, dissolved 1803) and is the site of a Bavarian royal castle modeled on the palace at Versailles. A former Benedictine convent (766–1803) is on the Fraueninsel. The lake has a steamer service.