1803

1803 was a common year starting on Saturday (see link for calendar).

Events

• January 30 - Monroe and Livingston sail for Paris to discuss, and possibly buy, New Orleans. They end completing the Louisiana Purchase.
• February 24 - The Supreme Court of the United States, in Marbury v. Madison, establishes the principle of judicial review.
• March 1 - Ohio is admitted as the 17th U.S. state, retroactive from August 7, 1953.
• April 30 - Louisiana Purchase made by the United States from France.
• May 18 - The United Kingdom redeclares war on France after France refused to withdraw from Dutch territory.
• July 4 - The Louisiana Purchase is announced to the American people.
• July 5 - The convention of Artlenburg leads to the French occupation of Hanover (which had been ruled by the British king).
• July 23 - Robert Emmet's uprising in Ireland begins
• July 26 - The wagonway between Wandsworth and Croydon is opened, being the first public railway line of the world.
• August 3 – British begin Second Anglo-Maratha War against Sindhia of Gwalior
• September 20 - Irish rebel Robert Emmet is executed
• September 23 - The Battle of Assaye in India – British-lead troops defeat Maratha forces
• October 20 - Senate ratifies the Louisiana Purchase Treaty, doubling the size of the United States.
• November 30 - At the Cabildo building in New Orleans, Spanish representatives Governor Manuel de Salcedo and the Marqués de Casa Calvo, officially transfer Louisiana Territory to French representative Prefect Pierre Clément de Laussat (just 20 days later, France had transferred the same land to the United States as the Louisiana Purchase).
  
• Aargau, Graubünden, St. Gallen, Thurgau, the Ticino, Vaud become Swiss cantons.
• France - the Livre Tournois (Tours Pound) is replaced by the Franc.
• William Osgoode, Chief Justice of Lower Canada, rules that slavery is inconsistent with British Law.
  

  Ongoing events

• Napoleonic Wars (1799-1815)
  

  Births

• February 2 - Albert Sidney Johnston, Confederate general (d. 1862)
• February 15 - John Sutter, California pioneer (d. 1880)
• April 7 - Flora Tristan, French feminist (d. 1844)
• May 12 - Justus von Liebig, German chemist (d. 1873)
• May 24 - Charles Lucien Bonaparte, French naturalist and ornithologist (d. 1857)
• May 25 - Ralph Waldo Emerson, American writer (d. 1882)
• May 25 - Edward George Bulwer-Lytton, English novelist and playwright (d. 1873)
• June 24 - George James Webb, English-born composer (d. 1887)
• July 24 - Adolphe Charles Adam, French composer (d. 1856)
• July 31 - John Ericsson, Swedish inventor and engineer (d. 1889)
• September 4 - Sarah Childress Polk, First Lady of the United States (d. 1891)
• September 27 - Samuel Francis du Pont, American admiral (d. 1865)
• September 28 - Prosper Mérimée, French writer (d. 1870)
• November 14 - Jacob Abbott, American writer (d. 1879)
• November 29 - Christian Doppler, Austrian mathematician (d. 1853)
• December 11 - Hector Berlioz, French composer (d. 1869)
  

  Deaths

• March 14 - Friedrich Gottlieb Klopstock, German poet (b. 1724)
• April 7 - Toussaint L'Ouverture, Haitian revolutionary (b. 1743)
• September 5 - Pierre Choderlos de Laclos, French general and author (b. 1741)
• September 27 - Samuel Adams, American patriot (b. 1722)
• December 18 - Johann Gottfried Herder, German philosopher and writer (b. 1744)
• Jacques-Donatien Le Ray, French "Father of the American Revolution" (b. 1726)