1800s
decade of the Gregorian calendar (1800–1809)
The 1800s was the decade that began on January 1, 1800 and ended on December 31, 1809. It is distinct from the decade known as the '''181st decade''' which began on January 1, 1801. and ended on December 31, 1810.
| Millennium: | 2nd millennium |
| Centuries: | 18th century – 19th century – 20th century |
| Decades: | 1770s 1780s 1790s – 1800s – 1810s 1820s 1830s |
| Years: | 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
Events
change- Beginning of the Napoleonic Wars (1803–1815).
- Semaphore is adopted by navies.
- The United Kingdom was founded (1801)
World leaders
change- Emperor Napoleon I (First French Empire)
- Emperor Francis II (Holy Roman Empire)
- Frederick William III of Prussia (Prussia)
- Pope Pius VII
- Tsar Paul I (Russia)
- Tsar Alexander I (Russia)
- King Charles IV (Spain)
- King George III, (United Kingdom)
- President John Adams (United States)
- President Thomas Jefferson (United States)
- Fath Ali Shah of Qajar dynasty (Persia)
- Jiaqing Emperor of China (Qing Dynasty)
Births
change- None at this time
Deaths
change- None at this time