Wilhelm (6 July 1785 –2 July 1823 ) Due to mental illness, Wilhelm was duke in name only, with his cousin Peter, Prince-Bishop of Lübeck, acting as regent throughout his entire reign.[4]
^"Frederick William III". Encyclopaedia Britannica. 30 July 2018.
^ abcGenealogie ascendante jusqu'au quatrieme degre inclusivement de tous les Rois et Princes de maisons souveraines de l'Europe actuellement vivans [Genealogy up to the fourth degree inclusive of all the Kings and Princes of sovereign houses of Europe currently living] (in French). Bourdeaux: Frederic Guillaume Birnstiel. 1768. p. 38.
^Huish, Robert (1821). Public and Private Life His Late Excellent and most Gracious Majesty George The Third. T. Kelly. p. 170.
^ ab"Oldenburg Royal Family". Monarchies of Europe. Archived from the original on 17 March 2006. Retrieved 1 January 2021.
^"Monarchies of Europe". Archived from the original on 14 June 2007.
^J. Morley, "The Bauhaus Effect," in Social Utopias of the Twenties (Germany: Müller Bushmann press, 1995), 11.
^Gerhard Schildt: Von der Restauration zur Reichsgründungszeit, in Horst-Rüdiger Jarck / Gerhard Schildt (eds.), Die Braunschweigische Landesgeschichte. Jahrtausendrückblick einer Region, Braunschweig 2000, pp. 753–766.