East Prussia (German: Ostpreußen, pronounced [ˈɔstˌpʁɔʏsən]; Latin: Borussia orientalis; Russian: Восточная Пруссия) was the main part of the region of Prussia along the southeastern Baltic Coast from the 13th century to the end of World War II in May 1945. From 1772–1829 and 1878–1945, the Province of East Prussia was part of the German state of Prussia.