Events and Trends

• Beginning of the Napoleonic Wars (1803 - 1815).
• 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.

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)

1800s

1800-те | 1800au | 1800'erne | 1800er | 1800. aastad | Años 1800 | Années 1800 | 1800í | 1800a yari | Anni 1800 | XIX amžiaus 1-as dešimtmetis | 1800-10 | 1800年代 | 1800-årene | Lata 1800-1809 | Década de 1800 | Anii 1800 | 1800-е | 1800s | 1800. | 1800-vuosikymmen | 1800-talet (decennium) | 1800年代