From Wikipedia, the free encyclopedia
|Centuries:||18th century – 19th century – 20th century|
|Decades:||1790s 1800s 1810s – 1820s – 1830s 1840s 1850s|
|Years:||1820 1821 1822 – 1823 – 1824 1825 1826|
|1823 in topic:|
|Archaeology – Architecture – Art – Literature – Music|
|Australia – Canada – France – Germany – Mexico – Philippines – South Africa – US – UK|
|Rail Transport – Science – Sports|
|Lists of leaders|
|Colonial Governors – State leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Ab urbe condita||2576|
|British Regnal year||3 Geo. 4 – 4 Geo. 4|
— to —癸未年十一月三十日
|- Vikram Samvat||1879–1880|
|- Shaka Samvat||1745–1746|
|- Kali Yuga||4924–4925|
|- Ǹrí Ìgbò||823–824|
|Japanese calendar||Bunsei 6
|Juche calendar||N/A (before 1912)|
|Julian calendar||Gregorian minus 12 days|
|Minguo calendar||89 before ROC
|Thai solar calendar||2366|
|Wikimedia Commons has media related to: 1823|
Year 1823 (MDCCCXXIII) was a common year starting on Wednesday (link will display the full calendar) of the Gregorian Calendar and a common year starting on Monday of the 12-day slower Julian calendar.
- January – In Paviland Cave on the Gower Peninsula of Wales, William Buckland discovers the "Red Lady of Paviland", the first identification of a prehistoric (male) human burial.
- February 3 – Gioachino Rossini's Semiramide is first performed.
- February 10 –; First worldwide carnival parade took place in Cologne, Germany.
- February 20 – Explorer James Weddell's expedition to Antarctica reaches latitude 74°15' S and longitude 34°16'45" W: the southernmost position any ship had reached before, a record that will hold for more than 80 years.
- March 19 – Agustin de Iturbide, Emperor of Mexico, abdicates thus ending the short-lived First Mexican Empire.
- April 13 – Eleven-year-old Franz Liszt gives a concert after which he is personally congratulated by Ludwig van Beethoven.
- June 5 – Raffles Institution established as the Singapore Institution by the founder of Singapore, Sir Stamford Raffles.
- July 1 – The congress of Central America declares absolute independence from Spain, Mexico, and any other foreign nation, including North America, and a Republican system of government is established.
- July – Robert Peel ensures the passage of five Acts of Parliament in the United Kingdom, effectively abolishing the death penalty for over one hundred offences; in particular, the Judgement of Death Act allows judges to commute sentences for capital offences other than murder or treason to imprisonment or transportation.
- July 10 – Gaols Act passed by Parliament of the United Kingdom, based on the prison reform campaign of Elizabeth Fry.
- July 15 – The Basilica of Saint Paul Outside the Walls in Rome is almost completely destroyed by fire.
- September 10 – Simón Bolívar is named President of Peru.
- September 22 – Joseph Smith, Jr. claimed in 1838 that on this day he had first come to the place where the Golden plates were stored, having been directed there by God through an angel.
- September 23 – First Burmese War: Burmese attack the British on Shapura, an island close to Chittagong.
- October 5 – Medical journal The Lancet is founded by Thomas Wakley in London.
- November – According to tradition, William Webb Ellis invents the sport of Rugby football at Rugby School in England.
- December 2 – James Monroe first introduces the Monroe Doctrine in the State of the Union Address, declaring that any European attempts to recolonize the Americas would be considered a hostile act towards the United States.
Date unknown 
- Beginning of the first Anglo-Ashanti war.
- Olbers' paradox is described by the German astronomer Heinrich Wilhelm Olbers.
- Work begins on the British Museum in London, designed by Robert Smirke, and the Altes Museum in Berlin, designed by Karl Friedrich Schinkel.
- Jackson Male Academy, precursor of Union University, is founded in Tennessee.
- The Oxford Union is founded.
- January 1 – Sándor Petőfi, Hungarian poet and revolutionary (d. 1849)
- January 8 – Alfred Russel Wallace, British naturalist and biologist (d. 1913)
- January 27 – Edouard Lalo, French composer (d. 1892)
- February 27 – Ernest Renan, French philosopher and writer (d. 1892)
- March 14 – Théodore de Banville, French writer (d. 1891)
- March 20 – Ned Buntline, American publisher, writer, and publicist (d. 1886)
- March 23 – Schuyler Colfax, Vice President of the United States (d. 1885)
- April 1 – Simon Bolivar Buckner, American soldier and politician and Confederate soldier (d. 1914)
- April 3 – William Marcy Tweed, American political boss (d. 1878)
- April 23 – Abd-ul-Mejid I, Ottoman Sultan (d. 1861)
- May 15 – Youssef Karam, Lebanese nationalist leader (d. 1889)
- May 17 – Henry Eckford, British horticulturist (d. 1905)
- May 22 – Solomon Bundy, American politician (d. 1889)
- May 26 – William Pryor Letchworth, founder of Letchworth State Park
- July 6 – Sophie Adlersparre, Swedish feminist (d. 1895)
- June 13 David Breakenridge Read, Mayor of Toronto (d.1904)
- June 21 – Jean Chacornac, French astronomer (d. 1873)
- July 18 – Felix du Temple de la Croix, French Army Captain & aviation pioneer (d. 1890)
- August 5 – Eliza Tibbets, mother of the California orange industry (d. 1898)
- August 10 – Hugh Stowell Brown, Manx preacher (d.1886)
- August 11– Charlotte Mary Yonge-English Author (d.1901)
- August 13 – Goldwin Smith, English historian (d. 1910)
- November 25 – Henry Wirz, Confederate military officer and prisoner-of-war camp commander (d. 1865)
- December 6 – Friedrich Max Müller, German Orientalist (d. 1900)
Date unknown 
- January 21 – Gideon Olin, U.S. politician (b. 1743)
- January 26 – Edward Jenner, English physician and medical researcher (b. 1749)
- February 7 – Ann Radcliffe, English writer (b. 1764)
- February 21 – Charles Wolfe, Irish poet (b. 1791)
- March 1 – Pierre-Jean Garat, opera singer (b. 1764)
- March 14
- March 18 – Jean-Baptiste Breval, French cellist (b. 1753)
- June 1 – Louis-Nicolas Davout, French marshal (b. 1770)
- August 20 – Pope Pius VII (b. 1740)
- August 22 – Lazare Carnot, French general, politician, and mathematician (b. 1753)
- September 11 – David Ricardo, English economist (b. 1772)
- September 23 – Matthew Baillie, Scottish physician and pathologist (b. 1761)
- September 28 – Charlotte Melmoth, British & American actress (b. 1749)
- November 9 – Vasily Kapnist, poet and dramatist (b. 1758)
- Aldhouse-Green, Stephen (October 2001). "Great Sites: Paviland Cave". British Archaeology (61). Retrieved 2010-07-16.
- Palmer, Alan; Veronica (1992). The Chronology of British History. London: Century Ltd. pp. 252–253. ISBN 0-7126-5616-2.
- "Timeline of capital punishment in Britain". Retrieved 2012-03-03.