Waldeck-Pyrmont Free State of Waldeck-Pyrmont Freistaat Waldeck-Pyrmont Arolsen 1918–29 Pyrmont merged into Prussia in 1921; Waldeck merged into Prussia in 1929. Württemberg Free People's State of Württemberg Freier Volksstaat Württemberg Stuttgart 1918 Split into Württemberg-Baden and Württemberg-Hohenzollern in 1945.