1820s
| Millennium: | 2nd millennium |
| Centuries: | 18th century – 19th century – 20th century |
| Decades: | 1790s 1800s 1810s – 1820s – 1830s 1840s 1850s |
| Years: | 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
The 1820s decade ran from January 1, 1820, to December 31, 1829.
Contents |
Politics and wars
Wars
Russo-Turkish War
- Russo-Turkish War (1828–1829)
- Caucasian War (1817–1864)
- Java War (1825–1830)
- 1828 Siamese-Lao War: Siam invades and sacks Vientiane.
Internal conflicts
- The Radical War is fought in Scotland.
Colonization
- Americo-Liberians begin to settle in the Colony of Liberia with the support of the American Colonization Society
Decolonization and independence
- Nationalistic independence helped reshape the world during this decade:
- Greece gains independence from the Ottoman Empire in the Greek War of Independence (1821–1827).
- Several countries declared their independence from Spain and Portugal:
- The Republic of Gran Colombia under President Simón Bolívar (1819–1828) expands over South America
- Mexico (1821)
- Brazil (1822)
Prominent political events
- The United Provinces of Central America were formed in 1823.
- Temperance movement emerges in U.S.
Technology
- World's first modern railway, the Stockton and Darlington Railway, opens to the public in 1825.
- Invention of the photograph and the first still existing photograph taken in 1826.
Economics
- United States (1825) The Erie Canal opens – passage from Albany, New York to Lake Erie and the Ohio and Erie Canal is dug to extend settlement access and commercial traffic to the Ohio River.
Popular culture
Music
- Beethoven's Ninth Symphony premiers on May 7, 1824 in the Kärntnertortheater in Vienna.
People
World leaders
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