Wilhelm (6 July 17852 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.
3 March â Ludwig van Beethoven publishes his Piano Sonata No. 14, commonly known as the "Moonlight Sonata" (Mondschein), in Vienna; the availability of the sheet music is announced by Giovanni Cappi in the newspaper Wiener Zeitung.