What is 1815?
{{Year nav|1815}} {{Year in various calendars|1815}} '''1815''' ([[Roman numerals|MDCCCXV]]) was a [[common year]] [[Common year starting on Sunday|starting on Sunday]] in the [[Gregorian calendar]] and a [[common year starting on Friday]] in the [[Julian calendar]]. == Events == * [[Fresnel]] developed the theory of light diffraction. * [[Napoleon]] loses the [[Battle of Waterloo]] and is sent to [[Saint Helena]]. == Births == *[[January 10]] – [[John A. Macdonald]], first [[Prime Minister of Canada]] (d. [[1891]]) *[[February 15]] – [[Constantin von Tischendorf]], German Biblical scholar (d. [[1874]]) *[[April 1]] – [[Otto von Bismarck]], German statesman (d. [[1898]]) * April 1 – [[Edward Clark]], [[Governor of Texas]] (d. [[1880]]) *[[April 6]] – [[Robert Volkmann]], German composer (d. [[1883]]) *[[April 24]] – [[Anthony Trollope]], British writer (d. [[1882]]) *[[June 11]] - [[Julia Margaret Cameron]], [[British India]]n photographer (d. [[1879]]) *[[August 5]] – [[Edward John Eyre]], explorer *[[October 16]] – [[Francis Lubbock]], [[Governor of Texas]] (d. [[1905]]) *[[October 31]] – [[Karl Weierstraß]], German mathematician (d. [[1897]]) *[[November 2]] – [[George Boole]], English mathematician and philosopher (d. [[1864]]) *[[December 10]] – [[Augusta Lovelace|Augusta Ada King (née Byron), Countess of Lovelace]], early English computer pioneer (d. [[1852]]) *[[November 12]] – [[Elizabeth Cady Stanton]], American women's rights activist (d. [[1902]]) *[[December 21]] – [[Thomas Couture]], French painter (d. [[1879]]) == Deaths == *[[January 8]] – [[Edward Pakenham]], British general (killed in battle) (born [[1778]]) *[[January 16]] – [[Emma, Lady Hamilton]], English mistress of [[Horatio Nelson]] (born [[1765]]) *[[February 24]] – [[Robert Fulton]], American inventor (born [[1765]]) *[[February 26]] – [[Prince Josias of Coburg]], Austrian general (born [[1737]]) *[[March 4]] – [[Frances Abington]], English actress (born [[1737]]) *[[March 5]] – [[Franz Mesmer]], German developer of hypnotism (born [[1