Explore 504 historical events from 1800–1809.
Michael Hillegas was an American merchant and politician who served as the first Treasurer of the United States from 1775 to 1789.
Michael Hillegas, American politician, 1st Treasurer of the United States (born 1728)
Nicolas-Joseph Cugnot was a French inventor who built the world's first full-size and working self-propelled mechanical land-vehicle, the "Fardier à vapeur" – effectively the world…
Nicolas-Joseph Cugnot, French engineer (born 1725)
Thomas Cochran was a Nova Scotia lawyer and judge in Prince Edward Island and Upper Canada.
Thomas Cochran, Canadian lawyer and judge (born 1777)
Sarah Crosby was an English Methodist preacher, and is considered to be the first woman to hold this title. Crosby, along with Mary Bosanquet, is one of the most popular women prea…
Sarah Crosby, English Methodist preacher (born 1729)
Meriwether Lewis was an American explorer, soldier, politician, and public administrator, best known for his role as the leader of the Lewis and Clark Expedition, also known as the…
Led by Meriwether Lewis and William Clark, the Corps of Discovery left Camp Dubois near present-day Hartford, Illinois,
Karl Ludwig Harding was a German astronomer, who discovered Juno, the third asteroid of the main-belt in 1804.
German astronomer Karl Ludwig Harding discovered one of the largest main-belt asteroids, naming it Juno after the…
L'Aigle is a L6 meteorite that fell on 26 April 1803 over L'Aigle, Lower Normandy, France, during a meteor shower. Before the event, it was generally believed that meteorites were …
Thousands of meteor fragments fall from the skies of L'Aigle, France; the event convinces European scientists that meteo
The Battle of Delhi or Battle of Patparganj took place on 11 September 1803 during the Second Anglo-Maratha War, between British East India Company troops of the Bombay Army under …
The Battle of Delhi, during the Second Anglo-Maratha War, between British troops under General Lake, and Marathas of…
Second Anglo-Maratha War was a large conflict within the Maratha Empire involving the East India Company. It resulted in a major loss of territory for the Marathas, including regio…
Second Anglo-Maratha War: The Battle of Assaye is fought between the British East India Company and the Maratha Empire…
Alexander von Nordmann was a Finnish biologist, who contributed to zoology, parasitology, botany and paleontology.
Alexander von Nordmann, Finnish biologist and paleontologist (died 1866)
Edward George Earle Lytton Bulwer-Lytton, 1st Baron Lytton, GCMG, PC was an English writer and politician. He served as a Whig member of Parliament from 1831 to 1841 and a Conserva…
Edward Bulwer-Lytton, English author, playwright, and politician, Secretary of State for the Colonies (died 1873)
The Louisiana Purchase was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Miss…
Louisiana Purchase: The United States purchases the Louisiana Territory from France for $15 million, more than doubling
The Napoleonic Wars (1803–1815) were a global series of conflicts fought by a fluctuating array of European coalitions against the French First Republic (1803–1804) under the First…
Napoleonic Wars: The United Kingdom revokes the Treaty of Amiens and declares war on France
The Haitian Revolution, also known as the Haitian War of Independence, was a successful insurrection by enslaved Africans against French colonial rule in Saint-Domingue, now the so…
Haitian Revolution: The Royal Navy led by Rear-Admiral John Thomas Duckworth commence the blockade of Saint-Domingue aga
The Louisiana Purchase was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Miss…
The Louisiana Purchase is announced to the US people.
The Convention of Artlenburg or Elbkonvention was the surrender of the Electorate of Hanover to Napoleon's army, signed at Artlenburg on 5 July 1803 by Oberbefehlshaber Johann Ludw…
The Convention of Artlenburg is signed, leading to the French occupation of the Electorate of Hanover (which had been…
Ralph Waldo Emerson, who went by his middle name Waldo, was an American essayist, lecturer, philosopher, minister, abolitionist, and poet who led the Transcendentalist movement of …
Ralph Waldo Emerson, American poet and philosopher (died 1882)
John Newton Brown was an influential Baptist teacher, minister and publisher in the 19th century.
John Newton Brown, American minister and author (died 1868)
Thomas Lovell Beddoes was an English poet, dramatist and physician.
Thomas Lovell Beddoes, English poet, playwright, and physician (died 1849)
John Adams II was an American government functionary and businessman. The second son of President John Quincy Adams and Louisa Adams, he is usually called John Adams II to distingu…
John Adams II , son of President John Quincy Adams and grandson of President John Adams (died 1834)
The Surrey Iron Railway (SIR) was a horse-drawn narrow-gauge plateway that linked Wandsworth and Croydon via Mitcham, all then in Surrey but now suburbs of south London, in England…
The Surrey Iron Railway, arguably the world's first public railway, opens in south London, United Kingdom.
John Dalton was an English chemist, physicist, and meteorologist whose work laid the foundations of modern atomic theory and stoichiometric chemistry. Building on earlier ideas abo…
British scientist John Dalton begins using symbols to represent the atoms of different elements.
The Louisiana Purchase was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Miss…
The United States Senate ratifies the Louisiana Purchase.
Albrecht Theodor Emil Graf von Roon was a Prussian soldier and statesman. As Minister of War from 1859 to 1873, Roon, along with Otto von Bismarck and Helmuth von Moltke, was a dom…
Albrecht von Roon, Prussian soldier and politician, 10th Minister President of Prussia (died 1879)