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, the 1800th year of the Common Era (CE) and Anno Domini (AD) designations, the 800th year of the 2nd millennium, the 100th and last year of the 18th century, and the 1st year of the 1800s decade. 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)