|Province of the Kingdom of Prussia (until 1918) and the Free State of Prussia|
East Prussia in the German Empire.
|36,993 km2 (14,283 sq mi)|
|31 January 1773|
• Province of Prussia
|3 December 1829|
• Province restored
|1 April 1878|
|Today part of|| Lithuania|
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.
After the defeat of Nazi Germany in World War II, the area was divided into to the Soviet Union (Russian SFSR, and Lithuanian SSR) and Poland (Warmian-Masurian Voivodeship). Königsberg was renamed Kaliningrad in 1946. The German population either evacuated or was expelled.