1856 (MDCCCLVI) was a leap year starting on Tuesday of the Gregorian calendar and a leap year starting on Sunday (dominical letter AG) of the Julian calendar, the 1856th year of the Common Era (CE) and Anno Domini (AD) designations, the 856th year of the 2nd millennium, the 56th year of the 19th century, and the 7th year of the 1850s decade. As of the start of 1856, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.
|Wikimedia Commons has media related to 1856.|
- January 8 –Borax deposits are discovered in large quantities by John Veatch in California.
- January 24 –U.S. President Franklin Pierce declares the new Free-State Topeka government in "Bleeding Kansas" to be in rebellion.
- January 26 –First Battle of Seattle: Marines from the USS Decatur suppress indigenous uprising in response to Governor Stevens' declaration of a "war of extermination" on Native communities.
- January 29
- February –The Tintic War breaks out in Utah.
- February 1 –Auburn University is first chartered as the East Alabama Male College.
- February 2 –Dallas, Texas is incorporated as a city.
- February 7 –The nawab of Oudh (Wajid Ali Shah) is exiled to Metiabruz and the state is annexed by the British East India Company.
- February 18 –The American Party (Know-Nothings) convene in Philadelphia to nominate their first Presidential candidate, former President Millard Fillmore.
- Great Trigonometrical Survey of India officially gives 'Peak XV' (later to be named Mount Everest) the height of 29,002 ft (8,840 m). 'Peak IX' (Kangchenjunga), previously thought to be the world’s highest, is confirmed as 28,156 ft (8,582 m).
- Mauveine, the first synthetic organic dye, is discovered by William Henry Perkin while attempting to synthesize quinine. This eventually leads to the birth of the chemical industry.
- March –Nepalese–Tibetan War: The signing of the Treaty of Thapathali concludes the war.
- March 5 –Fire destroys the Covent Garden Theatre in London.
- March 6 –Maryland Agricultural College (present-day University of Maryland, College Park) is chartered.
- March 20 –Filibuster War: Costa Rican troops rout Walker's soldiers in Battle of Santa Rosa.
- March 24 –Taiping Rebellion: Suspecting treachery on the part of East King Yang Xiuqing, Shi Dakai garrisons Anhui and begins his march back to the Heavenly Capital, having defeated a strong Xiang Army detachment.
- March 31 –The Treaty of Paris is signed, ending the Crimean War.
- April –Xhosa cattle-killing movement and famine begins in Cape Colony.
- April 7 –Nelson College is founded in Nelson, New Zealand.
- April 10 – Theta Chi Fraternity is founded at Norwich University.
- April 16 –Paris Declaration Respecting Maritime Law abolishes privateering and regulates the relationship between neutral and belligerent and shipping on the high seas.
- April 17 –The Chicago Historical Society Museum is established at 1601 N. Clark Street, Chicago.
- April 21 –Building workers agitate for the eight-hour day in Melbourne, Australia.
- April 29 –The iron-hulled paddle steamer RMS Persia concludes a 9-day 16 hour westbound transatlantic crossing at an average 13.11 knots (24.28 km/h), regaining the Blue Riband for the Cunard Line.
- May 1 –The province of Isabela is created in the Philippines in honor of Queen Isabella II of Spain.
- May 3 –Queen Victoria of the United Kingdom gives Norfolk Island to the population of the colony at Pitcairn Island, most being descendants of the Mutiny on the Bounty. They first settle on Norfolk Island on June 8. Women's suffrage as practiced on Pitcairn is extended to Norfolk Island.
- May 14 –A San Francisco Committee of Vigilance is founded in the United States. It lynches two gangsters, arrests most Democratic Party officials and disbands itself on August 18.
- May 20 –David Livingstone arrives at Quelimane on the Indian Ocean having completed a 2-year transcontinental journey across Africa from Luanda.
- May 21 –Lawrence, Kansas is captured and burned by pro-slavery forces (the "Sacking of Lawrence").
- May 22 –Congressman Preston Brooks of South Carolina beats Senator Charles Sumner with a cane in the hall of the United States Senate, for a speech Sumner had made attacking Southerners who sympathized with the pro-slavery violence in Kansas ("Bleeding Kansas"). Sumner is unable to return to duty for 3 years while he recovers; Brooks becomes a hero across the South.
- May 24 –Pottawatomie massacre: A group of followers of radical abolitionist John Brown kill 5 homesteaders in Franklin County, Kansas.
- June 2 –Battle of Black Jack: Antislavery forces, led by John Brown, defeat proslavery forces in Bleeding Kansas.
- June 9 –500 Mormon handcart pioneers leave Iowa City and head west for Salt Lake City, Utah, carrying all their possessions in two-wheeled handcarts.
- June 13 –Taiping Rebellion: Shi Dakai arrives at Nanjing.
- July 9 –Natal becomes a Crown colony.
- July 14–15 –In Spain, General Leopoldo O'Donnell takes control of the government, bringing an end to the bienio progresista.
- July 17 –The Great Train Wreck (the worst railroad calamity in the world to date) occurs near Philadelphia, Pennsylvania, USA.
- July 31 –Christchurch, New Zealand is chartered as a city.
- August 10 –Last Island hurricane destroys Last Island, Louisiana, leaving 400 dead. The whole island is broken up into several smaller islands by the storm.
- August 30 –Battle of Osawatomie: Proslavery forces defeat antislavery forces in Bleeding Kansas.
- September 1 –Seton Hall University is founded by Archdiocese of Newark Bishop James Roosevelt Bayley, a cousin of U.S. President Theodore Roosevelt and nephew of Saint Elizabeth Ann Seton.
- September 2 –Taiping Rebellion: Wei Changhui and Qin Rigang assassinate Yang Xiuqing.
- October 8 –The Second Opium War between several western powers and China begins with the Arrow Incident on the Pearl River.
- October 13 –American mercenary William Walker effectively takes control of Nicaragua.
- November 1 –Anglo-Persian War: War is declared between Great Britain and Persia.
- November 4 –United States presidential election, 1856: Democrat James Buchanan defeats former President Millard Fillmore, representing a coalition of "Know-Nothings" and Whigs, and John C. Frémont of the fledgling Republican Party, to become the 15th President of the United States.
- November 11 –Taiping Rebellion: Shi Dakai arrives at the Heavenly Capital once more with 100,000 men and demands that Wei Changhui and Qin Rigang be executed. Shi subsequently becomes head of the government.
- November 17 –American Old West: On the Sonoita River in present-day southern Arizona, the United States Army establishes Fort Buchanan in order to help control new land acquired in the Gadsden Purchase.
- November 21 –Niagara University is founded in Niagara Falls, New York.
- November 27 –The Coup of 1856 leads to Luxembourg's unilateral adoption of a new, reactionary constitution, as King-Grand Duke William III signs the new constitution without the Chamber of Deputies' consent.
- December 1 –Under the County and Borough Police Act, in any county or area of England and Wales where a police force has not already been established, the Justices of the Peace must from this date take steps to create one according to nationally defined standards.
- December 2 –National Portrait Gallery, London, established.
- December 9 –Bushehr surrenders to the British.
- Gregor Mendel starts his research on genetics.
- Kate Warne, the first female private detective, begins to work for the Pinkerton Detective Agency.
- Pre-human remains are found in the Neandertal valley in Germany.
- Legal protection of widow remarriage is extended in India.
- St. Paul's School, Belgaum is founded by the Jesuits in Belgaum, India.
- British Guiana 1c magenta postage stamp issued in British Guiana in limited numbers; the one surviving specimen will become regarded as the world's rarest stamp.
- January 11 – Christian Sinding, Norwegian composer (d. 1941)
- January 12 – John Singer Sargent, American artist (d. 1925)
- February 2
- February 5 – Frank Podmore, British psychical researcher (d. 1910)
- February 9 – Hara Takashi, Japanese politician, 10th Prime Minister of Japan (d. 1921)
- February 12 – Eduard von Böhm-Ermolli, Austrian general and German field marshal (d. 1941)
- February 14 – Frank Harris, Irish author and editor (d. 1931)
- February 15 – Emil Kraepelin, German psychiatrist (d. 1926)
- February 20 – Prince Unakan Ananta Norajaya Son of King Mongkut and Piam Sucharitakul (d. 1873)
- February 21 or February 28 –Maurycy Gottlieb, Ukrainian painter (d. 1879)
- March 4
- March 8
- March 9 – Jules-Albert de Dion, French automobile pioneer (d. 1946)
- March 16 – Napoléon Eugène Louis John Joseph, Prince Imperial, son of French Emperor Napoleon III (d. 1879)
- March 20
- March 26 – William Massey, 19th Prime Minister of New Zealand (d. 1925)
- April 5 – Booker T. Washington, American educator (d. 1915)
- April 12 – William Martin Conway, British art critic and mountaineer (d. 1937)
- April 18 – Hammerton Killick, Haitian admiral (d. 1902)
- April 23 – Granville T. Woods, African-American inventor (d. 1910)
- April 24 – Philippe Pétain, French soldier and statesman (d. 1951)
- April 26 – Sir Joseph Ward, 17th Prime Minister of New Zealand (d. 1930)
- April 27 – Tongzhi Emperor of China (d. 1875)
- May 6
- May 13 – Fernando Tamagnini de Abreu e Silva, Portuguese general (d. 1924)
- May 15 – L. Frank Baum, American author, poet, playwright, actor and independent filmmaker (The Wizard of Oz) (d. 1919)
- May 21 – José Batlle y Ordóñez, 3-time President of Uruguay (d. 1929)
- May 25
- June 14 – Andrey Markov, Russian mathematician (d. 1922)
- June 22 – H. Rider Haggard, English novelist (d. 1925)
- June 29 – Maria Cederschiöld, Swedish journalist (d. 1935)
- July 7 – Georg von der Marwitz, German general (d. 1929)
- July 10 – Nikola Tesla, Serbian-American inventor (d. 1943)
- July 11 – Georgiana Drew, American stage actress, married Maurice Barrymore in 1876, (d. 1893)
- July 23 – Bal Gangadhar Tilak, Indian political activist (d. 1920)
- July 24 – Franklin Ware Mann, American inventor (d. 1916)
- July 26 – George Bernard Shaw, Irish writer, Nobel Prize laureate (d. 1950)
- August 3 – Alfred Deakin, 3-time Prime Minister of Australia (d. 1919)
- August 10 – William Willett, promoter of Daylight Saving Time (d. 1915)
- August 13 – Alfred Deakin, second Prime Minister of Australia (d. 1919)
- August 15
- September 1 – Sergei Winogradsky, Russian scientist (d. 1953)
- September 3 – Louis Sullivan, American architect (d. 1924)
- September 18 – Wilhelm von Gloeden, German photographer (d. 1931)
- September 27 – Bríet Bjarnhéðinsdóttir, Icelandic women's right activist (d. 1940)
- October 6 – William Shea, British actor (d. 1918)
- October 30 – Charles Leroux, American balloonist and parachutist (d. 1889)
- November 13 – Louis Brandeis, Associate Justice of the Supreme Court of the United States (d. 1941)
- November 14
- November 16 – Jürgen Kröger, German architect (d. 1928)
- November 17 – Demetrio Castillo Duany, Cuban revolutionary, soldier, and politician (d. 1922)
- November 21 – William Emerson Ritter, American biologist (d. 1944)
- November 22 – Heber J. Grant, seventh president of The Church of Jesus Christ of Latter-day Saints (d. 1945)
- November 24 – Bat Masterson, American lawman (d. 1921)
- November 29 – Theobald von Bethmann-Hollweg, Chancellor of Germany (d. 1921)
- December 2 – Robert Kajanus, Finnish conductor and composer (d. 1933)
- December 6– Hans Molisch, Czech-Austrian botanist (d. 1937)
- December 10 – Dewa Shigetō, Japanese admiral (d. 1930)
- December 10 – Karolina Widerström, Swedish physician and women's rights activist (d. 1949)
- December 11
- December 13 – Svetozar Boroević, Austrian field marshal (d. 1920)
- December 18
- December 22 – Frank B. Kellogg, United States Secretary of State, recipient of the Nobel Peace Prize (d. 1937)
- December 25 – Hans von Bartels, German painter (d. 1913)
- December 28 – Woodrow Wilson, 28th President of the United States, recipient of the Nobel Peace Prize (d. 1924)
- January 14 – Janko Drašković, Croatian politician and reformer (b. 1770)
- January 16 – Thaddeus William Harris, American naturalist (b. 1795)
- January 31 – Khedrup Gyatso, 11th Dalai Lama (b. 1838)
- February 4 – Anna Gottlieb, Austrian operatic soprano (b. 1774)
- February 17 – Heinrich Heine, German writer (b. 1797)
- May 3 – Adolphe Charles Adam, French composer (b. 1803)
- June 23 – Ivan Kireyevsky, Russian literary critic and philosopher (b. 1806)
- June 26 – Max Stirner, German philosopher (b. 1806)
- July 9 – Amedeo Avogadro, Italian chemist (b. 1776)
- July 11 – Norberto Ramírez, Central American politician
- July 14 – Edward Vernon Utterson, English lawyer, literary antiquary, collector and editor (b. 1775/1776)
- July 20 – Anna Nielsen, Danish mezzo-soprano (b. 1803)
- July 29
- August 14 – William Buckland, English geologist and palaeontologist (b. 1784)
- August 19 – Anna Maria Rüttimann-Meyer von Schauensee, politically active Swiss salonist (b. 1772)
- August 29 – Mary Anne Schimmelpenninck, British Christian writer (b. 1778)
- August 30 – Gilbert Abbott à Beckett, English writer (b. 1811)
- September 3 – Honório Hermeto Carneiro Leão, Marquis of Paraná, Brazilian politician (b. 1801)
- October 19
- November 23 – Manuela Sáenz, Colombian national heroine (b. 1797)
- December 20 – Francesco Bentivegna, Italian revolutionary (b. 1820)
- "Railroads — prior to the Civil War". North Carolina Business History. 2006. Archived from the original on July 26, 2011. Retrieved 2011-08-26.
- Garfield, Simon (2000). Mauve: How One Man Invented a Colour that Changed the World. London: Faber. ISBN 0-571-20197-0.
- "Central Africa, explored". Unimaps.com. 2005. Retrieved 2011-08-26.
- Palmer, Alan; Veronica (1992). The Chronology of British History. London: Century Ltd. pp. 276–277. ISBN 0-7126-5616-2.
- Friar, Stephen (2001). The Sutton Companion to Local History (rev. ed.). Stroud: Sutton Publishing. p. 243. ISBN 0-7509-2723-2.
- "Gallery history". National Portrait Gallery. Retrieved 2011-08-26.
- Carlton, R. Scott (1997). The International Encyclopaedic Dictionary of Philatelics. Iola, WI: Krause. p. 36. ISBN 0-87341-448-9.