Albert Sidney Johnston ( February 2, 1803 – April 6, 1862 ) served as a general in three different armies: the Texas Army, the United States Army, and the Confederate States Army.

* 1803 – Louisiana Purchase: The United States purchases the Louisiana Territory from France for $ 15 million, more than doubling the size of the young nation.

* 1803 – Albrecht von Roon, Prussian soldier and statesman, 10th Prime Minister of Prussia ( d. 1879 )

* 1803 – Edward Beecher, American theologian ( d. 1895 )

* 1803 – Vladimir Odoevsky, Russian philosopher and writer ( d. 1869 )

In the mid-19th century important leaders included Transcendentalists such as Ralph Waldo Emerson ( 1803 – 1882 ) and Henry David Thoreau ( 1817 – 1862 ).

* 1803 – Joseph Paxton, English gardener and architect, designed The Crystal Palace ( d. 1865 )

* 1803 – Thousands of meteor fragments fall from the skies of L ' Aigle, France ; the event convinces European science that meteors exist.

* 1736 – Johann Christoph Kellner, German organist and composer ( d. 1803 )

* 1744 – Johann Gottfried Herder, German writer ( d. 1803 )

* 1803 – Luís Alves de Lima e Silva, Duke of Caxias, Brazilian military commander ( d. 1880 )

The Captainship General of Cuba, encompassing Cuba and the governorships of Florida ( safe the English occupation between 1763 – 83 ), Santo Domingo ( until 1795 ), Puerto Rico, and the entire Louisiana Territory ( 1763 – 1803 )

* 1803 – Lewis and Clark start their expedition to the west by leaving Pittsburgh, Pennsylvania at 11 in the morning.

* 1719 – Johann Wilhelm Ludwig Gleim, German poet ( d. 1803 )

* 1724 – Giovanni Battista Casti, Italian poet and author ( d. 1803 )

* 1882 – Ralph Waldo Emerson, American essayist ( b. 1803 )

* 1721 – Granville Leveson-Gower, 1st Marquess of Stafford, English politician ( d. 1803 )

During the Helvetic Republic ( 1798 – 1803 ), the county of Baden, the Freie Ämter and the region known as the Kelleramt were combined into the Canton of Baden.

** 1802 – 1803 Johann Heinrich Rothpletz ( b. 1766 – d. 1833 )

** 10 March 1803 – 26 April 1803 Johann Rudolf Dolder ( b. 1753 – d. 1807 )

Flora Tristan ( 7 April 1803 in Paris – 14 November 1844 in Bordeaux, France ) was a socialist writer and activist.

Louisiana Creole ( also called French Créole ) refers to native born people of the New Orleans area who are descended from the Colonial French and / or Spanish settlers of Colonial French Louisiana, before it became part of the United States in 1803 with the Louisiana Purchase.

After the defeat of the French forces under Napoleon at the Battle of the Nile in 1801, the Egyptian antiquities collected were confiscated by the British army and presented to the British Museum in 1803.

" In this way, the common law was eventually incorporated into the legal systems of every state except Louisiana ( which inherited a civil law system from its French colonizers before the Louisiana Purchase of 1803, adopting a code similar to but not directly based on the Napoleonic Code of 1804 ).

* 1855 – Jacques Charles François Sturm, French mathematician ( b. 1803 )

* 1716 – Jean François de Saint-Lambert, French poet ( d. 1803 )

* 1803 – Hector Berlioz, French composer ( d. 1869 )

* 1803 – François-Marie-Thomas Chevalier de Lorimier, French Canadian Patriote ( d. 1839 )

* 1803 – Jean François de Saint-Lambert, French poet ( b. 1716 )

After the French Revolution and the Napoleonic Wars ( 1803 – 1815 ), feudalism fell away and liberalism and nationalism clashed with reaction.

The Haitian army, now led by Dessalines, devastated Rochembeau and the French army at the Battle of Vertières on November 18, 1803.

After the French removed the surviving 7, 000 troops in late 1803, the leaders of the revolution declared the new nation of independent Haiti in early 1804.

After Napoleon imposed the Convention of Artlenburg ( Convention of the Elbe ) on July 5, 1803, about 30, 000 French soldiers occupied Hanover.

* 1713 – Marie Dumesnil, French actress ( d. 1803 )

* 1803 – The Convention of Artlenburg leads to the French occupation of Hanover ( which had been ruled by the British king ).

* 1803 – Adolphe Adam, French composer ( d. 1856 )

* 1740 – Jeanne Baré, French explorer ( d. 1803 )

* 1803 – Peter Chanel, French priest and saint ( d. 1841 )

In 1803, Pierre Samuel du Pont de Nemours, a French nobleman, began to help negotiate with France at the request of Jefferson.

But yellow fever and the fierce resistance of black revolutionaries destroyed the French army in what became the only successful slave revolt in history, and it withdrew its surviving troops in November 1803.

Biot's study, initiated by the French Academy of Sciences, was compelled by a meteorite fall of thousands of meteorites on April 26, 1803 from the skies of L ' Aigle, France.

* 1875 – Edgar Quinet, French historian ( b. 1803 )

* 1803 – In New Orleans, Louisiana, Spanish representatives officially transfer the Louisiana Territory to a French representative.