General
Population: 1.12 Billion*
- Entertainment: Writers include Heine Buch der Lieder, Victor Hugo Cromwell, Leopardi, Henry Hallam (constitutional history of Britain), John Keble
Art includes Constable "The Cornfield",
Music includes Bellini, Schubert, Beethoven
- Medicine: Richard Bright describes Bright's disease (kidneys)
- Science: Audubon publishes "Birds of North America"
Karl von Baer writes about mammals
Friedrich Wohler obtains metallic aluminum from clay
George S. Ohm formulates Ohm's Law defining electrical current potential and resistance
- Technology: Frenchman Nicephore Niépce takes first photograph
Sulfur friction matches introduced by John Walker
- Travel: Karl Baedeker begins publishing travel guides
- Deaths: Painter CHarles Willson Peale, Physicist Alessandro Volta, Educator Johann Heinrich Pestalozzi, Caricaturist Thomas Rowlandson, Poet William Blake,
Composer Ludwig von Beethoven, Author Ugo Foscolo, Author Wilhelm Hauff, Astronomer Marquis Pierre Simon de Laplace,
John Darby founds Plymouth Brethren, New Harmony commune fails
Africa
- Egypt: Fighting against Europe with Turkey
Americas
- General: U.S. and Great Britain sign a treaty allowing joint occupation of Oregon country
- Peru: Peru secedes from Colombia
Asia
- India: Famine in Hindustan
Europe
- General: France, Britain and Russia fight Turkey over Greece
- Cospaia: Republic incorporated into Italian states
- France: French election shows new nationalism
- Great Britain: Nash designs Carlton House Terrace in Westminster
"Evening Standard" in London appears
James Simpson constructs sand filter for purification of London's water supply
- Greece: Russia France and Britain urge Turkey to end war with Greece – rejected by the sultan and Turks invade Athens –
Turks and Egyptians defeated at battle of Navarino
Count Kapodistrias elected President
- Portugal: Dom Miguel betrothed to his niece Maria II and made regent
Middle East
- Ottoman Empire: Battle of Navarino Bay where British, French and Russian navies destroy Turkish fleet over Greece
Sultan Mohammed II rejects right of Allies to mediate in war
Treaty of London forces truce with Europe
- Persia: Russia defeats Persia and takes Erivan (Armenia)
Pacific