East Prussia
East Prussia (German: Ostpreußen; Polish: Prusy Wschodnie; Lithuanian: Rytų Prūsija; Latin: Borussia orientalis; Russian: Восточная Пруссия, Vostochnaya Prussiya) was a province in the Kingdom of Prussia from 1773 to 1829. From 1878 to 1918, it was part of the German Empire. From 1918 until 1945, it was a part of the Weimar Republic's Free State of Prussia. It's capital was Königsberg.