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 – 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 )

* 1722 – Joseph Wilton, English sculptor ( d. 1803 )

* 1803 – Joseph Hansom, English architect and inventor ( d. 1882 )

* July 16 – Joseph Wilton, English sculptor ( d. 1803 )

Joseph Lemercier ( born Paris 1803 — died 1884 ), considered by some of his contemporaries to be “ the soul of lithography ”, was also one of the founders of the modern crayon.

Discovered in 1803 by Jacques Joseph Champollion-Figeac, brother of the egyptologist Jean-François Champollion, the church is one of the first monuments classified in France thanks to the intervention of Prosper Mérimée, historic monument inspector.

Much as Miles Joseph Berkeley ( 1803 – 1889 ) had insisted in 1841 that the fungus found in potato blight was the cause of the disease, de Bary declared that the rust and smut fungi were the causes of the pathological changes in diseased plants.

* Joseph K. Mansfield ( 1803 – 1862 ), Union army general in the American Civil War

* Joseph Stewart Cottman, ( 1803 – 1863 ), born near Allen, United States Congressman from Maryland

Sir Joseph Whitworth, 1st Baronet ( 21 December 1803 – 22 January 1887 ) was an English engineer, entrepreneur, inventor and philanthropist.

Warren County was erected May 1, 1803, from Hamilton County, and named for Dr. Joseph Warren, a hero of the Revolution who sent Paul Revere on his ride and who died at the Battle of Bunker Hill.

* Joseph Wilton ( 1722 – 1803 ), an English sculptor

* Joseph Bloomfield ( 1753 – 1823 ), Captain in Revolutionary War, New Jersey Attorney General, Chief Justice of the New Jersey Vice-Admiralty Court, president of the first Society for the Abolition of Slavery, Mayor from 1795 to 1800, Governor of New Jersey ( 1801 – 1802 and 1803 – 1812 ), a Brigadier General in the War of 1812 and U. S. Representative from 1817 to 1821.

* Joseph Alexander Adams ( 1803 – 80 ), engraver.

Sir Joseph Paxton ( 3 August 1803 – 8 June 1865 ) was an English gardener and architect, best known for designing The Crystal Palace.

The garden designer Joseph Paxton ( 1803 – 1865 ), creator of the Crystal Palace, started his career in the gardens at Chiswick for the Royal Horticultural Society before his talents were recognised by William Cavendish, the sixth Duke of Devonshire and he relocated as ‘ Head Gardener ’ to Chatsworth House, Derbyshire.

By 1800, Joseph began to dabble in inventing: a treadle loom in 1800, a loom to weave fishing nets in 1803, and starting in 1804, the “ Jacquard ” loom, which would weave patterned silk automatically.

Joseph Priestley, after he had fled to America and not long before his death, wrote a letter that was read to the American Philosophical Society in 1803.

* John Joseph Merlin, inventor of the roller skate ( September 17, 1735 in Huy-May 4, 1803 in London )

*; and the articles there on Francis Fry ( 1803 – 1886 ), Edmund Fry ( 1754 – 1835 ), Joseph Storrs Fry ( 1826 – 1913 ), Edward Fry ( 1827 – 1918 ), and Sophia Fry née Pease.

Joseph VinoyJoseph Vinoy ( 10 August 1803, Saint-Étienne-de-Saint-Geoirs, Isère – 27 April 1880, Paris ) was a French soldier.

* John Joseph Merlin ( 1735 – 1803 ), Belgian inventor and horologist

* Joseph Napoléon, 2nd Prince de La Moskowa ( Paris, 8 May 1803 – Saint-Germain-en-Laye, 25 July 1857 ).

Joseph Stannard ( 13 Sep 1797 – 7 Dec 1830 ) was an English marine and landscape painter, and etcher, a prominent member of the Norwich School of artists ( 1803 – 1833 ), which also included John Crome and John Sell Cotman.

The first prize of $ 350 was awarded to Joseph Francois Mangin and John McComb, Jr .. Mangin, who was the principal designer, studied architecture in his native France before becoming a New York City surveyor in 1795 and publishing an official map of the city in 1803.