BREISACH, a bailiwick in the circle of Treisam, of the duchy of Baden, on the Rhine, containing two cities, twelve villages, and six hamlets, with 13,215 inhabitants. The chief city, of the same name, celebrated for its former strong castle, stands on the Rhine, and has a population of 2711 persons. Long. 7. 28. 30. E. Lat. 48. 1. 48. N.