He returned to politics to oppose the pro-slavery Kansas – Nebraska Act ( 1854 ); this law repealed the slavery-restricting Missouri Compromise ( 1820 ).

Percy Bysshe Shelley composed a " Hymn of Apollo " ( 1820 ), and the god's instruction of the Muses formed the subject of Igor Stravinsky's Apollon musagète ( 1927 – 1928 ).

Causes include controversy over admitting Missouri as a slave state in 1820, the acquisition of Texas as a slave state in 1845 and the status of slavery in western territories won as a result of the Mexican – American War and the resulting Compromise of 1850.

* 1820 – Nadar, French photographer, caricaturist, journalist, novelist and balloonist ( d. 1910 )

* 1820 – Alexander Ypsilantis is declared leader of Filiki Eteria, a secret organization to overthrow Ottoman rule over Greece.

* 1820 – George Grove, English historian ( d. 1900 )

* 1890 – David Wilber, American politician ( b. 1820 )

* 1751 – Wilhelmina of Prussia, Princess of Orange ( d. 1820 )

* 1820 – Andrew Rainsford Wetmore, Canadian politician ( d. 1892 )

* 1820 – Constitutionalist insurrection at Oporto, Portugal.

* Alfonso Sanz y Martínez de Arizala ( 28 January 1880, Madrid – 1970 ), married in 1922 to María de Guadalupe de Limantour y Mariscal ( d. 1977, Marbella ), daughter of Julio de Limantour y Marquet ( 17 June 1863, Mexico City – 11 October 1909, Mexico City ) and wife Elena Mariscal y ..., paternal granddaughter of French Joseph Yves de Limantour y Rence de la Pagame ( 1812, Ploemeur – 1885, Mexico City ) and wife Adèle Marquet y Cabannes ( 1820, Bordeaux –?

* 1771 – Karl Philipp Fürst zu Schwarzenberg, Austrian field marshal ( d. 1820 )

* 1820 – Alexander Cartwright, American inventor of Baseball ( d. 1892 )

Anne Brontë (; 17 January 1820 – 28 May 1849 ) was a British novelist and poet, the youngest member of the Brontë literary family.

Four more children followed: Charlotte, ( 1816 – 1855 ), Patrick Branwell ( 1817 – 1848 ), Emily, ( 1818 – 1848 ) and Anne ( 1820 – 1849 ).

* 1899 – Joseph Wolf, German artist ( b. 1820 )

* Daniel Boone ( November 2, 1734 October 22 – September 26, 1820 ) was an American pioneer, explorer, and frontiersman whose frontier exploits made him one of the first folk heroes of the United States.

* 1820 – The Venus de Milo is discovered on the Aegean island of Melos.

The land which is now Columbus was bought by General John Tipton and Luke Bonesteel in 1820.

* 1893 – John Tyndall, Irish physicist ( b. 1820 )

* 1820 – John Tenniel, English illustrator ( d. 1914 )

Other notable pre-20th century examples include Giacomo Casanova's 1788 Icosaméron, a 5-volume, 1, 800-page story of a brother and sister who fall into the Earth and discover the subterranean utopia of the Mégamicres, a race of multicolored, hermaphroditic dwarfs ; Symzonia: A Voyage of Discovery by a " Captain Adam Seaborn " ( 1820 ) which reflected the ideas of John Cleves Symmes, Jr .; Edgar Allan Poe's 1838 novel The Narrative of Arthur Gordon Pym of Nantucket ; Jules Verne's 1864 novel A Journey to the Center of the Earth, which described a prehistoric subterranean world ; and George Sand's 1884 novel Laura, Voyage dans le Cristal where unseen and giant crystals could be found in the interior of the Earth.

Image: Harwich lighthouse by John Constable c1820. jpg | Painting of Harwich lighthouse by John Constable c. 1820.

Sir John Tenniel ( Bayswater, London, 28 February 1820 – 25 February 1914 ) was a British illustrator, graphic humourist and political cartoonist whose work was prominent during the second half of England ’ s 19th century.

* John F. Young ( 1820 – 1885 ), American Episcopal bishop of Florida, translator of the hymn Silent Night

The turning point came with the debate on the Missouri Compromise in 1820 when he broke with his friend John C. Calhoun, who became the most outspoken national leader in favor of slavery.

* 1820 – William John Macquorn Rankine, Scottish engineer and physicist ( d. 1872 )

Posthumous Portrait of Percy Shelley | Shelley Writing Prometheus Unbound ( Shelley ) | Prometheus Unbound ( 1845 ) On 17 September 1820, Severn set sail onboard the Maria Crowther from England to Italy with the famous English poet John Keats.

They had two sons: Victor Gifford ( 1809 – 1860 ) and John Woodhouse Audubon ( 1812 – 1862 ); and two daughters who died while young: Lucy at two years ( 1815 – 1817 ) and Rose at nine months ( 1819 – 1820 ).

* John Henry Brown ( 1820 – 1895 ), Texas politician, historian, chaired Texas articles of Secession

* John Brown ( cricketer, born 1820 ) ( 1820 –?

* 1820 – John William Dawson, Canadian geologist ( d. 1899 )

The invention of the wrought iron rail by John Birkinshaw in 1820 allowed the short, brittle, and often uneven, cast iron rails to be extended to lengths.

John Trumbull ’ s Declaration of Independence had won popular acclaim in 1820.

Wilson, after deliberating, decided keeping Marshall on would demonstrate party unity ; thus in 1916 Marshall won reelection over the still divided Republican Party and became the first vice president re-elected since John C. Calhoun in 1828, and Wilson and Marshall became the first president and vice president team to be re-elected since Monroe and Tompkins in 1820.

His theoretical and observational work provided the foundation for modern binary star astronomy ; new catalogues adding to his work were not published until after 1820 by Friedrich Wilhelm Struve, James South and John Herschel.

* July 1 – John F. Reynolds, American general ( b. 1820 )

* July 8 – John Wright Oakes, landscape painter ( b. 1820 )

* 1820: John Keats completes Ode on Melancholy, one in a series of his famous Odes.

* 1820: John Clare 13 July 1793-20 May 1864 publishes Poems Descriptive of Rural life 1820

John Tyndall FRS ( 2 August 1820 – 4 December 1893 ) was a prominent 19th century physicist.

Other notable inhabitants include John Tyndall ( born 1820 – died 1893, buried in St. Bartholemews, Haslemere ), eminent physicist, mountaineer and science educator, who first established the radiative properties of various greenhouse gases, and who built a retirement home near Haslemere in 1885.

* December 4-John Tyndall ( born 1820 ), British physicist.

* John Tyndall, prominent 19th century physicist, was born in Main Street, Leighlinbridge in 1820.