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The United States after the Louisiana Purchase in 1803
In the Louisiana Purchase, the United States bought the French colony Louisiana , thereby doubling its national territory.
Title page of the Reichsdeputationshauptschluss
With the Reichsdeputationshauptschluss the Holy Roman Empire is politically reorganized.
Matthew Flinders
Matthew Flinders succeeds in circumnavigating the Australian continent for the first time .
1803 in other calendars
Armenian calendar 1251/52 (turn of the year July)
Ethiopian calendar 1795/96 (September 11-12)
Bengali solar calendar 1208/09 (beginning of April 14th or 15th)
Buddhist calendar 2346/47 (southern Buddhism); 2345/46 (alternative calculation according to Buddhas Parinirvana )
Chinese calendar 74th (75th) cycle

Year of the Water Pig癸亥 ( at the beginning of the year Water Dog壬戌)

Chula Sakarat (Siam, Myanmar) / Dai calendar (Vietnam) 1165/66 (turn of the year April)
Dangun era (Korea) 4136/37 (October 2/3)
French revolutionary calendar Year XI./XII. of the Republic (September 21/22)
Iranian calendar 1181/82
Islamic calendar 1217/18 (turn of the year 22/23 April)
Jewish calendar 5563/64 (September 16-17)
Coptic calendar 1519/20 (September 11th / 12th)
Malayalam calendar 978/979
Seleucid era Babylon: 2113/14 (turn of the year April)

Syria: 2114/15 (turn of the year October)

Vikram Sambat (Nepalese Calendar) 1859/60 (April)


Politics and world events


Northern Italy 1803
Napoleon in the field camp near Boulogne
  • June: France prepares to invade England. Troops are gathered in Boulogne-sur-Mer and other places on the Channel coast. The stationing lasts until 1805.
  • June 26 : Sweden pledged Wismar to the Duchy of Mecklenburg-Schwerin for 100 years .
  • July 5th : Without a shot being fired, the Hanoverian Lieutenant General von Wallmoden-Gimborn signs the surrender, the Artlenburg Convention ; the 16,000 strong Hanoverian army is disarmed.
  • July 23 : Robert Emmet and others start an unsuccessful rebellion against Great Britain in Ireland . On August 25 he was arrested and on September 20 executed.
  • September 27th : Switzerland concludes a military surrender and defensive alliance with France and becomes a de facto French protectorate until 1813. Among other things, it has to provide soldiers for Napoleon's armies.
  • October 19 : France and Spain sign a neutrality agreement in Paris . Spain has to pay France 6 million francs a month retrospectively and open its ports to French ships.


India during the Second Marath War

United States of America


Haitian Revolution
Relief map of Saint Lucia


  • February: The Cape Colony occupied by England (today South Africa) is returned to the Batavian Republic (Netherlands) due to the peace of Amiens concluded the previous year .


  • The first European immigrants, mainly British prisoners, are settled on the Australian island of Tasmania .


science and technology

Voyages of discovery

The Nadezhda

Steam engines

Trevithicks steam car
  • June 17 : A steam-powered car by the English inventor Richard Trevithick transports eight passengers for the first time on a test drive in London. The London Steam Carriage attracts the attention of the public and the press, but is much more expensive to operate than a normal horse-drawn carriage and therefore cannot prevail. That same year, one of Trevithick's stationary steam engines explodes, killing four workers. His competitor James Watt , who always warned of the danger of boiler explosions, then tried to enforce a ban on Trevithick's machines in the British Parliament , but was unsuccessful.
  • August 9 : The American inventor Robert Fulton demonstrates the Clermont steamship on the Seine in Paris . But Napoleon Bonaparte does not believe that the steam drive has a future.

Natural sciences

Teaching and Research


East side of the clock tower


  • November 20 : In Mainz, the verdict of the criminal special court against serial offender Johannes Bückler , known as Schinderhannes, and another 62 defendants. The process caused a sensation throughout Central Europe. France's First Consul Napoleon Bonaparte refuses a pardon.
Elizabeth Patterson-Bonaparte


  • In the case of a flood in Madeira , the capital Funchal is largely destroyed. Around 600 people are killed.

nature and environment


January February

March April

Albrecht von Roon

May June

Justus von Liebig

July August

September October

November December

Christian Doppler
Johann Carl Fuhlrott

Exact date of birth unknown


First half of the year

Friedrich Gottlieb Klopstock, 1779

Second half of the year

Ignazio Busca
Samuel Adams
Johann Gottfried Herder, 1785

Exact date of death unknown

Web links

Commons : 1803  - Collection of Pictures, Videos and Audio Files