1800s

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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

[edit] Events and Trends

• Beginning of the Napoleonic Wars (1803 - 1815).
• Flag semaphore is adopted by navies.
• The Kingdom of Great Britain and the Kingdom of Ireland merge into the United Kingdom of Great Britain and Ireland in 1801.

[edit] World Leaders

• Emperor Napoleon I (First French Empire)
• Emperor Francis II (Holy Roman Empire)
• Pope Pius VII
• Emperor Alexander I (Russia)
• King Charles IV (Spain)
• King George III, (United Kingdom of Great Britain and Ireland)
• President John Adams (United States)
• President Thomas Jefferson (United States)
• Fath Ali Shah of Qajar dynasty (Persia)als:1800er

ca:Dècada del 1800 cy:1800au da:1800'erne de:1800er et:1800. aastad el:Δεκαετία 1800 es:Años 1800 eu:1800eko hamarkada fr:Années 1800 ga:1800í ko:1800년대 io:1800a yari id:1800-an is:1801–1810 it:Anni 1800 lt:XIX amžiaus 1-as dešimtmetis ms:1800-an nl:1800-1809 ja:1800年代 no:1800-årene nrm:Annaées 1800 pl:Lata 1800-1809 pt:Década de 1800 ro:Anii 1800 ru:1800-е scn:1800ini simple:1800s sk:0. roky 19. storočia sl:1800. fi:1800-vuosikymmen sv:1800-talet (decennium) zh:1800年代