Olsztyn ôl´shtĭn [key], Ger. Allenstein, city (1993 est. pop. 165,600), capital of Warmiısko-Mazurskie prov., N Poland. It is a trade, manufacturing, and railroad center, as well as a popular health resort. Founded (1348) by the Teutonic Knights, who built its impressive castle, it was ceded to Poland in 1466 and to Prussia in 1772. The city was retained by Germany after a plebiscite in 1920. It suffered heavy damage in World War II and reverted to Poland in 1945.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2023, Columbia University Press. All rights reserved.

See more Encyclopedia articles on: Polish Political Geography