Stralsund, a strongly fortified seaport town of Prussia, in Pomerania, capital of a district of its own name, on the strait which separates the island of Rugen from the mainland, 125 m. N. by W. of Berlin; pop. in 1871, 26,731. The town is situated on an insular site, surrounded by the strait and several ponds, and can only be approached by bridges which connect it with its three suburbs on the mainland. It has a gloomy appearance, but is clean and well paved. The churches of St. Nicholas and St. Mary are fine specimens of the pointed style of architecture. The gymnasium has both a museum and a library. The manufactures include linen and woollen goods, starch, sugar, tobacco, soap, and leather. The town owns nearly 300 vessels, of about 70,000 tons. The chief exports are wheat, malt, timber, wool, and linen. The harbor is large, but shoals prevent vessels drawing more than 15 ft. from entering it. - Stralsund was built by Jaromar I., prince of Rugen, about 1209, and in the 14th century was one of the most important Hanse towns.

It successfully resisted a memorable siege 'by Wallenstein in 1628. The Swedes gained possession of it by the peace of Westphalia, and Frederick William, elector of Brandenburg, captured it from them in 1678, but restored it in 1679. Stralsund surrendered to the Prussian, Danish, and Saxon forces in 1715, but was restored to Sweden in 1720. In 1807 it surrendered to the French, who destroyed part of the fortifications. By the treaty of Kiel in 1814 it was ceded to Denmark, and in 1815 Denmark surrendered it to Prussia.