Example image of eyePlorer eyePlorer map for 'Masuria': Masurian Lake District Poland Baltic Curonian Lagoon Ethnic group Old Prussians Vistula Lagoon Lithuanian mythology Old Prussian Catholicism Protestantism Prussian Crusade Teutonic Knights Duchy of Prussia German Empire Kingdom of Prussia Germanisation Unification of Germany East Prussian plebiscite Weimar Republic Flight and expulsion of Germans from Poland during and after World War II Ecotourism Balts Bartians Galindians Pogesanians Pomesanians Yotvingians Aurochs Bear Elk Christianity Ełk Keep Northern Crusades Danish people Dutch people Flemish people French people Germans Norwegians Peace of Thorn (1411) Poles Second Peace of Thorn (1466) Kingdom of Poland (1385–1569) Albert, Duke of Prussia Lutheranism History of Poland Northern Wars Tatars