1820s
| 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 | |
Events and Trends
- Nationalistic independence movements helped reshape the world during this decade:
- Greece declares independence from the Ottoman Empire (1821).
- 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)
- The United Provinces of Central America were formed in 1823.
World Leaders
- Emperor Francis II (Austria)
- Chancellor Klemens Wenzel von Metternich (Austria)
- King Louis XVIII (France)
- King Charles X (France)
- Pope Pius VII
- Pope Leo XII
- Emperor Alexander I (Russia)
- Emperor Nicholas I (Russia)
- King George IV (United Kingdom)
- President James Monroe (United States)
- President John Quincy Adams (United States)
Categories: 1820s