Example image of eyePlorer eyePlorer map for 'East Prussia': 13th century Baltic Sea Prussia (region) World War II Germany Province of East Prussia Prussia Königsberg Old Prussians Teutonic Knights Christianity Northern Crusades Germanisation Germans Lithuanian people Poles Duchy of Prussia State of the Teutonic Order 17th century 18th century Old Prussian Albert of Hohenzollern House of Hohenzollern Prince-elector Brandenburg-Prussia Margraviate of Brandenburg Brandenburg Franconia Holy Roman Empire HRE King in Prussia First Partition of Poland Polish–Lithuanian Commonwealth Royal Prussia Province of Prussia West Prussia German Empire Klaipėda Region Lithuania Treaty of Versailles Weimar Republic World War I Joseph Stalin Kaliningrad Oblast Lithuanian Soviet Socialist Republic Nazi Germany People's Republic of Poland Soviet Union Warmian-Masurian Voivodeship Kaliningrad