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.[7]
20 November – Beethoven's only opera Fidelio, in its original form (known retrospectively as Leonore), is premiered at the Theater an der Wien in Vienna, which at this time is under French military occupation.
^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.
^Albinus, Robert (1985). Lexikon der Stadt Königsberg Pr. und Umgebung (in German). Leer: Verlag Gerhard Rautenberg. p. 371. ISBN3-7921-0320-6.
^Bozzini, P. (1806). "Lichtleiter: eine Erfindung zur Anschauung innerer Theile und Krankheiten nebst der Abbildung". J Practischen Arzneykunde. Berlin. 24: 107–24.
^Bush, Ronnie Beth; Leonhardt, Hanna; Bush, Irving M.; Landes, Ralph R. (1974). "Dr. Bozzini's Lichtleiter: A translation of his original article (1806)". Urology. 3 (1): 119–23. doi:10.1016/S0090-4295(74)80080-4. PMID4591409.
^Randel, Don Michael (1999). The Harvard Biographical Dictionary of Music. Cambridge: Belknap Press. p. 376. ISBN978-0-67400-084-1.