1821

Deaths 
 January 4 – Elizabeth Ann Seton, American saint (b. 1774)
 February 23 – John Keats, British poet (b. 1795)
 March 13 – John Hunter, second Governor of New South Wales (b. 1737)
 May 5 – Napoleon I of France (b. 1769)
 May 19 –  Camille Jordan, French politician (b. 1771)
 September 10 – Johann Dominicus Fiorillo, German painter and art historian