The schooner Amistad, seized by African captives who had revolted against their enslavers, arrived under U.S. custody, triggering a landmark freedom trial.

The French Academy of Sciences heard further details of Daguerre's photographic process, accelerating a race to master the new medium across Europe.

The United States Exploring Expedition under Charles Wilkes departed Hampton Roads, Virginia, beginning a four-year voyage that would map thousands of miles of Antarctic coastline.

Chinese commissioner Lin Zexu's forces sealed off foreign merchants in Canton, escalating a standoff over opium that pushed Britain and China toward war.

Supporters of the People's Charter pressed forward their campaign for universal male suffrage as tensions built toward the mass petition drives that defined Britain's working-class Chartist movement.

The Treaty of London finalized Luxembourg's borders and full independence from the Netherlands, ending a partition dispute following Belgium's 1830 revolution.

The French Academy of Sciences publicly revealed Louis Daguerre's photographic process, freely gifting it to humanity as a state pension.

The United States Exploring Expedition, led by Charles Wilkes, departed Norfolk, Virginia, to chart the Pacific and Antarctic waters.

Sultan Abdulmejid I issues the Edict of Gülhane, launching the Tanzimat reforms that reshaped Ottoman law, taxation, and civil rights.

A federal grand jury indicted the Africans who had seized the schooner Amistad on piracy and murder charges, setting off a landmark legal battle over slavery and freedom.

British and Chinese warships clash off the Chinese coast near Canton, an early skirmish escalating toward the First Opium War.

A Connecticut court ordered the release of Sengbe Pieh (Joseph Cinqué) and other Amistad captives, a landmark moment in the American abolitionist movement.