Lębork

Lębork, called Lauenburg in German, stands on the Łeba in eastern Pomerania. It grew on the site of a Slavic settlement, and in 1341 the Teutonic Order founded a town here under Kulm law. The knights completed a castle east of the town in 1363. After the Battle of Grunwald in 1410, Polish forces took the castle, but it returned to the order under the peace of 1411.

Lębork joined the Prussian Confederation against the order in 1440. During the Thirteen Years' War, the town changed hands as Duke Eric of Pomerania and the city of Gdańsk pursued shifting alliances. The Second Peace of Thorn in 1466 returned the region to Poland, whose king granted Lębork and Bytów to Eric and his successors as a Polish fief.