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.