1800

Millennium:	2nd millennium
Centuries:	17th century – 18th century – 19th century
Decades:	1770s  1780s  1790s  – 1800s –  1810s  1820s  1830s
Years:	1797 1798 1799 – 1800 – 1801 1802 1803

1800 by topic
Arts, history, and science
Archaeology Architecture Art Literature Poetry Music Science
Countries
Lists of leaders
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Birth and death categories
Births Deaths
Establishments and disestablishments categories
Establishments Disestablishments
Works category
Works

1800 (MDCCC) was an exceptional common year starting on Wednesday in the Gregorian calendar and a leap year starting on Sunday in the Julian calendar. Because of a leap day in the Julian calendar, the Gregorian calendar moved ahead by 12 days.

Events

• World population hits 1 billion.
• March 14 – Cardinal Barnaba Chiaramonti is elected pope as Pius VII.
• March 21 – Pius VII is ordained.
• April 24 – U.S. Library of Congress founded.
• May 5 – Great Britain passes the Act of Union to join Great Britain and Ireland into the United Kingdom of Great Britain and Ireland 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 14 – Battle of Marengo, Napoleon defeats the Austrian troops near Marengo, Italy.
• June 2 – First smallpox vaccination in North America, at Trinity, Newfoundland.
• June 27 – Pascha Jussuf Karamanli of Tripoli declares war on Sweden by having the flagpole on the consulate chopped down.
• September 5 – The island of Malta, that was occupied by the French, is conquered by British troops.
• November 1 – U.S. President John Adams becomes the first President of the United States to live in the Executive Mansion (later renamed the White House).
• November 17 – The U.S. Congress holds its first Washington, DC session.
• December 3 – Battle of Hohenlinden, the French army defeats the Austrian troops.
• December 24 – An assault on Napoleon Bonaparte fails in Paris.
• December 24 – Pierre Coudrin and Henriette Aymer de la Chevalerie found the Congregation of the Sacred Hearts of Jesus and Mary in Paris.
• Invention of the voltaic pile by Alessandro Volta: the first chemical battery
• The infrared radiation is discovered by Wilhelm Herschel.
• The Althing of Iceland, the world's oldest parliament, is abolished.

Births

for more information, see Category:1800 births.

January 7 - Millard Fillmore, thirteenth President of the United States (d. 1874)

1800 Media

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  May 15: Napoleon begins crossing the Alps.

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  Martha Christina Tiahahu

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  GeorgeHudsonProjectGutenbergeText

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  Anna-Maria-Hall

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  Taken from page 43 of Volume XIX of A History of All Nations from the Earliest Times by John Henry Wright published by Lea Brothers & Co. in 1906 Philadelphia and New York. John Henry Wright died in 1908 more than 70 years ago.

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  John Brown

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  Photo of Elizabeth Ann Whitney, an early Latter-day Saint leader, and the wife of Newel K. Whitney, another early Latter Day Saint leader.

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  Friedrich Wöhler (1800-1882), German Chemist*Lithography by Rudolf Hoffmann, 1856, after a photograph by Petri (Göttingen) From "Gallerie ausgezeichneter Naturforscher" published in Vienna

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  Helmuth von Moltke the Elder

Deaths

for more information, see Category:1800 deaths.

November 30 - Charles Adams, son of John Adams (b. 1770)