a city in the Rostock district of the German Democratic Republic (GDR). Located on the southern shore of Wismar Bay, on the Baltic Sea. Population, 55,300 (1969). It is a principal fishing port of the GDR and one of the largest ports in freight turnover, with a shipyard and industries servicing it, as well as sugar-refining, woodworking, paper, and chemical industries.
Wismar (Slavic, Vishemir) was one of the ancient trading centers of the Polabian Slavs (the Bodrichi); in the 12th and 13th centuries it was subjected to Germanization. Enfranchised as a city in 1229, Wismar served as the residence of the Mecklenburg princes from 1256 to 1358. It was one of the most important cities of the Hanseatic League. Wismar belonged to Sweden from 1648 to 1803 (formally to 1903).