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.
↑Apfelstedt, F.; Apfelstedt, Heinrich Friedrich Theodor (1996). Das Haus Kevernburg-Schwarzburg von seinem Ursprunge bis auf unsere Zeit. Thüringer Chronik-Verlag Müllerott. ISBN978-3-910132-29-0.
↑J. Morley, "The Bauhaus Effect," in Social Utopias of the Twenties (Germany: Müller Bushmann press, 1995), 11.