1823
| Years: 1820 1821 1822 - 1823 - 1824 1825 1826 | |
| Decades: 1790s 1800s 1810s - 1820s - 1830s 1840s 1850s | |
| Centuries: 18th century - 19th century - 20th century 1823 in art List of state leaders in 1823 | |
Events
- July 15 - San Paolo fuori le Mura church in Rome almost completely destroyed by fire
- September 10 - Simón Bolívar named President of Peru
- December 2 - US President James Monroe delivers a speech to the United States Congress, announcing a new policy of forbidding European interference in the Americas and establishing American neutrality in future European conflicts (this would later be called the Monroe Doctrine)
- December 23 - A Visit From St. Nicholas, attributed to Clement Clarke Moore, is first published
- Ferdinand VII revokes Spanish Constitution of 1812 and restores absolute monarchy
- The Olbers' paradox is described by the German astronomer Heinrich Wilhelm Olbers.
Births
- January 8 - Alfred Russel Wallace, naturalist and biologist (d. 1913)
- February 27 - Ernest Renan, Professor of Old Testament in the Collčge de France (d. 1892)
- March 20 - Ned Buntline, "dime novelist", publisher, writer, publicist (d. 1886)
- March 23 - Schuyler Colfax, Vice President of the United States (d. 1885)
- April 3 - William Marcy Tweed, political boss (d. 1878)
- April 23 - Abd-ul-Mejid, future Ottoman sultan (d. 1861)
- June 21 - Jean Chacornac, astronomer (d. 1873)
- August 13 - Goldwin Smith, historian (d. 1910)
- December 6 - Friedrich Max Müller, Orientalist (d. 1900)
Deaths
- January 26 - Edward Jenner, inventor of the vaccine (b. 1749)
- February 7 - Ann Radcliffe, writer (b. 1764)
- August 20 - Pope Pius VII (b. 1740)
- September 11 - David Ricardo, economist (b. 1772)
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