1850s

Millennium:	2nd millennium
Centuries:	18th century – 19th century – 20th century
Decades:	1820s 1830s 1840s – 1850s – 1860s 1870s 1880s
Years:	1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
Categories:	Births – Deaths – Architecture; Establishments – Disestablishments

The 1850s was the decade that began on January 1, 1850 and ended on December 31, 1859.

Events

Production of steel revolutionised by invention of the Bessemer process
Benjamin Silliman fractionates petroleum by distillation for the first time
First transatlantic telegraph cable laid
First safety elevator installed by Elisha Otis
Charles Darwin publishes The Origin of Species, putting forward the theory of evolution by natural selection
Epidemiology begins when John Snow traces the source of an outbreak of cholera in London to a contaminated water pump.
Discovery of Neandertal fossils in Neanderthal, Germany
Solar flares discovered by Richard Christopher Carrington
Crimean War (1854–1856) fought between Imperial Russia and an alliance consisting of the United Kingdom of Great Britain and Ireland, the Second French Empire, the Kingdom of Sardinia and the Ottoman Empire. The majority of the conflict takes place around Crimea, on the northern coasts of the Black Sea.
The Indian Mutiny: revolt against the East India Company's British rule in India
Dissolution of the Mughal Empire by the British.
156 are killed in Paris in a failed assassination attempt on Napoleon III, Emperor of France
Moldavia and Wallachia are unified and form Romania.
Gideon T. Stewart attempts to create a Prohibition Party.

Millennium:	2nd millennium
Centuries:	18th century – 19th century – 20th century
Decades:	1820s 1830s 1840s – 1850s – 1860s 1870s 1880s
Years:	1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
Categories:	Births – Deaths – Architecture Establishments – Disestablishments