1797 1798 1799 - 1800 - 1801 1802 1803
1770s 1780s 1790s - 1800s - 1810s 1820s 1830s
Events of 1800
- February 13 – The Bank of France is founded
- March 14 – Cardinal Barnaba Chiaramonti succeeds Pius VI as Pius VII, the 251st pope.
- March 20 – Alessandro Volta describes his new invention, the voltaic pile, the first chemical battery, in a letter to the Royal Society.
- April – Voting begins in the United States presidential election, 1800; it will last until October. The result is not announced until February 1801.
- April 24 – The U.S. Library of Congress is founded.
- May 5 – Great Britain passes the Act of Union to join Great Britain and Ireland into the United Kingdom (to take effect on 1 January 1801). The act is signed by King George III in August.
- May 15 – Napoleon Bonaparte crosses the Alps and invades Italy.
- June 2 – First smallpox vaccination is made in North America, at Trinity, Newfoundland.
- June 14 – Battle of Marengo: Napoleon defeats the Austrian troops near Marengo, Italy.
- September 5 – At the invitation of the Maltese, British troops liberate the Islands of Malta and Gozo from the French.
- September 30 – The Convention of 1800, or Treaty of Mortefontaine, is signed between France, Britain, and the United States of America, ending the Quasi-War.
- November 1
- November 17 – The U.S. Congress holds its first Washington, D.C. session.
- December 3 – Battle of Hohenlinden: the French army defeats German troops.
- December 24
- An assault on Napoleon Bonaparte fails in Paris.
- Pierre Coudrin and Henriette Aymer de la Chevalerie found the Congregation of the Sacred Hearts of Jesus and Mary in Paris.
- France - Convention of 1800 : Text of the Treaty. The Avalon Project. Yale Law School.