View source for 1820s

{{Short description|Decade}}
{{More citations needed|date=December 2009}}
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 | footer = From top left, clockwise: [[Ludwig van Beethoven]] re-emerged as a popular composer during this decade, when his iconic '''[[Symphony No. 9 (Beethoven)|Symphony No. 9]]''' is first performed in [[Vienna]] in 1824. The '''[[First Industrial Revolution]]''' achieves peak momentum for the West, as depicted in this engraving of a textile factory operating in [[Manchester]], arguably England's industrial hub of the 19th century; The '''[[View from the Window at Le Gras|world's oldest photograph]]''' was taken in 1826, as seen above. The decade was the start of [[daguerreotype]] development – an instrument used for motion-picture capturing and was a precursor instrument to the [[camera]]; '''[[South American wars of independence]]''' were on full swing, as countries like [[Brazil]], [[Bolivia]], [[Peru]], and [[Uruguay]] gained their independence at this era; a turning point for regional politics, and heavily influenced South America's contemporary socio-political conditions; Crowds gather to witness the opening of the world's first railway –&nbsp;the '''[[Stockton and Darlington Railway]]''' – as it formally commenced in 1825; The world's first '''[[electric motor]]''' was created by Hungarian engineer [[Ányos Jedlik]]. His invention would drive to form modern-day knowledge and utilization of [[electricity]], and forged way for studies on [[electrochemistry]] and [[engineering]] to grow; '''[[Antarctica]]''' was discovered and explored for the first time. Its inaugural expedition into continental waters was led by a Russian crew headed by [[Fabian Gottlieb von Bellingshausen]], in 1819 to 1821; As [[European colonialism]] began gaining ground in Africa and Asia, opposition from affected/exploited societies resulted, with wars such as the '''[[Java War]]'''.
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{{Decadebox|182}}

The '''1820s''' was a [[decade]] of the [[Gregorian calendar]] that began on January 1, 1820, and ended on December 31, 1829.

It saw the rise of the [[First Industrial Revolution]]. [[Photography]], [[rail transport]], and the [[textile industry]] were among those that largely developed and grew prominent over the decade, as [[technology]] advanced significantly. European [[colonialism]] began gaining ground in [[Africa]] and [[Asia]], and trade with the [[Qing Dynasty]] began to open up more towards foreign traders, particularly those from Europe. As [[European imperialism]] gained momentum, opposition from affected/exploited societies resulted, with wars such as the [[Java War]] and the [[Greek War of Independence]]. Resistance in the form of separatism and nationalism (particularly in the [[Spanish American wars of independence]]) led to the independence of many countries around the world, such as [[Brazil]], [[Peru]], and [[Bolivia]].

== Politics and wars ==
{{See also|List of sovereign states in the 1820s}}
The [[Greek War of Independence]] and the [[Russo-Turkish War]] were two of the decade's more important conflicts. Meanwhile, [[colonialism in Africa]] had just begun to accelerate, and global trade between Asian powers (e.g. the [[Qing Dynasty]]) with European powers (mainly the [[British Empire|British]] and [[First French Empire|French]] empires) increased substantially. In [[South America]], [[State (polity)|states]] such as [[Bolivia]], [[Peru]], and [[Brazil]] gained independence from the [[Spanish Empire]] and [[Portuguese Empire]].

=== Global ===
* 1820: [[Anchor coinage]] is issued for use in some British colonies.

=== East Asia ===
==== Indonesia ====
{{Main|Dutch East Indies}}
* 1824 &ndash; The [[Netherlands|Dutch]] sign the Masang Agreement, temporarily ending hostilities in the [[Padri War]] in [[West Sumatra]].

===== Java War =====
{{Main|Java War}}
The Java War (also known as the "Diponegoro War") was fought in Java between 1825 and 1830. It started as a [[rebellion]] led by Prince [[Diponegoro]] after the Dutch decided to build a road across a piece of his property that contained his parents' tomb.

The troops of Prince Diponegoro were very successful in the beginning, controlling the middle of Java and besieging Yogyakarta. Furthermore, the Javanese population was supportive of Prince Diponegoro's cause, whereas the Dutch colonial authorities were initially very indecisive. As the Java war prolonged, Prince Diponegoro had difficulties in maintaining the numbers of his troops.  Prince Diponegoro started a fierce guerrilla war and it was not until 1827 that the Dutch army gained the upper hand.  The Dutch colonial army was able to fill its ranks with troops from [[Sulawesi]], and later on from the [[Netherlands]].

The rebellion finally ended in 1830, after Prince Diponegoro was tricked into entering Dutch custody near [[Magelang]], believing he was there for negotiations for a possible cease-fire.  It is estimated that 200,000<ref name="RicKlefs">M. C. RicKlefs: ''A History of modern Indonesia since 1300'', p.&nbsp;117.</ref> died over the course of the conflict, 8,000 being Dutch.<ref name="RicKlefs" />

==== Malaysia ====
{{Main|British Malaya}}
* November [[1821]] - [[Siamese invasion of Kedah]] &ndash; The [[Rattanakosin Kingdom|Siamese]] forces of [[Buddha Loetla Nabhalai|King Rama II]] achieved a rapid victory against those of [[Sultan Ahmad Tajuddin Halim Shah II]] of [[Sultanate of Kedah|Kedah]], in what is now northern [[Malaysia]]. The campaign initiated a period of two decades in which Kedah resisted Siamese control. The Sultan took refuge on [[Penang Island]], then under British control.<ref>{{Cite web|url=https://www.san.beck.org/20-9-Siam,Laos,Cambodia1800-1950.html|title=Siam, Cambodia, and Laos 1800-1950 by Sanderson Beck|website=www.san.beck.org}}</ref>  By 1822 there was a rise in the population of the British territories caused by an influx of Malays displaced by the invasion.<ref>{{cite book|author=Nordin Hussin|title=Trade and Society in the Straits of Melaka: Dutch Melaka And English Penang, 1780–1830|url=https://books.google.com/books?id=64xZZ3gbajMC&pg=PA188|access-date=20 April 2012|year=2007|publisher=NIAS Press|isbn=978-87-91114-88-5|page=188}}</ref>
* [[1826]] &ndash; The [[Burney Treaty]] allowed the Siamese view of their rights to prevail in Kelah.<ref>[[Frank Athelstane Swettenham]], ''Map to Illustrate the Siamese Question'' (1893) p. 62; [https://archive.org/stream/apf3019.0001.001.umich.edu#page/62/mode/2up archive.org.]</ref>
* [[1826]] &ndash; The British [[crown colony]] of the [[Straits Settlements]] is established in what is now [[Malaysia]] and [[Singapore]].

==== Vietnam ====
{{Main|Nguyen dynasty}}
* [[February 14]], 1820 &ndash; [[Minh Mang]] starts to rule in [[Vietnam]].
* [[1825]] &ndash; [[Minh Mang]] outlaws the teaching of [[Christianity]] in [[Vietnam]].

==== Laos ====
{{Main|History of Laos to 1945}}
* [[1827]]: [[King Anouvong]] of [[Kingdom of Vientiane|Vientiane]] declares war on [[Thailand|Siam]] and successfully attacks [[Nakhon Ratchasima]].
* [[1828]] Siamese-Lao War: The [[Thai people|Siamese]] invade and sack the city of [[Vientiane]].
* [[November 12]], 1828: Anouvong is deposed and his kingdom is annexed by Siam. Large forced population transfers are made from Laos to the more securely held area of [[Isan]], and the Lao mueang is divided into smaller units to prevent another uprising.

==== Burma ====
{{Main|Konbaung dynasty}}
* 1824–1826: The [[First Anglo-Burmese War]] ended in a British victory, and by the [[Treaty of Yandaboo|Treaty of Yandabo]], Burma lost territory previously conquered in Assam, Manipur, and Arakan.<ref name=app>{{cite book | title=History of Burma | author=Lt. Gen. Sir Arthur P. Phayre | year=1967 | pages=236–247 | edition=Second | publisher=Susil Gupta | location=London}}</ref> The British also took possession of Tenasserim with the intention to use it as a bargaining chip in future negotiations with either Burma or Siam.<ref name="Hall">{{cite book|url=http://mission.itu.ch/MISSIONS/Myanmar/Burma/bur_history.pdf |author=D. G. E. Hall |year=1960 |title=Burma |publisher=Hutchinson University Library |pages=109–113 |url-status=dead |archive-url=https://web.archive.org/web/20050519230755/http://mission.itu.ch/MISSIONS/Myanmar/Burma/bur_history.pdf |archive-date=2005-05-19 }}</ref>

==== Brunei ====
{{Main|Bruneian Civil War of 1826}}

* 1826–1828: The Bruneian Civil War of 1826 began in [[1826]], ending in [[1828]] with the [[garrote]] of [[Muhammad Alam]].{{sfn|Orr|2008|p=35}}

==== Siam (Thailand) ====
{{Main|Rattanakosin Kingdom}}
* 1824–1826 - [[Rattanakosin Kingdom]] (Siam): [[Buddha Loetla Nabhalai|Rama II]] died in 1824 and was peacefully succeeded by his son [[Jessadabodindra]] (Rama III). In 1825 the British sent another mission to Bangkok led by [[East India Company]] emissary [[Henry Burney]]. They had by now annexed southern Burma and were thus Siam's neighbours to the west, and they were also extending their control over [[British Malaya|Malaya]]. The King was reluctant to give in to British demands, but his advisors warned him that Siam would meet the same fate as Burma unless the British were accommodated. In 1826, therefore, Siam concluded its first commercial treaty with a western power, the [[Burney Treaty]]. Under the treaty, Siam agreed to establish a uniform taxation system, to reduce taxes on foreign trade and to abolish some of the royal monopolies. As a result, Siam's trade increased rapidly, many more foreigners settled in Bangkok, and western cultural influences began to spread. The kingdom became wealthier and its army better armed.

=== Australia ===
* 1824 &ndash; The name ''Australia'', recommended by [[Matthew Flinders]] in [[1804]], is finally adopted as the official name of the country once known as ''[[New Holland (Australia)|New Holland]]''.
* [[September 13]], 1824 &ndash; With his crew and 29 [[convicts]] aboard the ''Amity'', [[John Oxley]] arrives at and founds the [[Moreton Bay, Queensland|Moreton Bay]] Penal Settlement at what is now [[Redcliffe City, Queensland|Redcliffe]] in [[Queensland]], Australia, after leaving [[Sydney]].
* [[December 25]], [[1826]] &ndash;  Major [[Edmund Lockyer]] arrives at [[King George Sound]] to take possession of the western part of Australia, establishing a settlement near [[Albany, Western Australia|Albany]].
* [[June 3]], [[1829]] &ndash; The Swan River Colony (later to become the cities of [[Perth]] and [[Fremantle]]) is founded in [[Western Australia]]. This secures the western 'third' of the Australian landmass for the British.
* [[August 12]], [[1829]] &ndash; Mrs. Helen Dance, wife of the captain of the ship ''Sulphur'', cuts down a tree to mark the day of the founding of the town of [[Perth]], Western Australia.

=== Central Asia ===
* [[Caucasian War]] (1817–1864)
* [[1826]] &ndash; [[United Kingdom|Britain]] annexes [[Assam]].

=== South Asia ===
* [[Siege of Bharatpur (1825–1826)|Siege of Bharatpur]] – [[India]] (9 December 1825 – 18 January 1826) ended in British victory.
* [[December 4]], [[1829]] &ndash; [[History of India|India]]: In the face of fierce opposition, [[United Kingdom|British]] [[Lord William Bentinck]] carries a regulation declaring that all who abet [[Sati (practise)|sati]] in India are guilty of culpable [[homicide]].

=== Western Asia ===
* [[October 1]], [[1827]] &ndash; [[Russo-Persian War, 1826–1828]]: The Russians under [[Ivan Paskevich]] storm [[Yerevan]], ending a millennium of Muslim domination in [[Eastern Armenia]].
* [[February 22]], [[1828]] &ndash;[[Treaty of Turkmenchay]]: Russian-Persian peace treaty: Russia captures [[Eastern Armenia]] from [[Iran|Persia]].

=== Europe ===
[[File:January Suchodolski - Akhaltsikhe siege.jpg|thumb|right|250px|[[Russo-Turkish War (1828–1829)|Russo-Turkish War]]]]

==== Eastern Europe ====
* [[April 6]] 1821 &ndash; The [[Greek War of Independence]] against the [[Ottoman Empire]] is proclaimed officially in South Greece.
* [[June 19]], 1821 &ndash; The [[Philikí Etaireía]] are decisively defeated by the [[Ottoman Empire|Ottomans]] at [[Drăgăşani]] (in [[Wallachia]]).
* December [[1825]] &ndash; The [[Decembrist Revolt]] breaks out in Russia, but is thoroughly suppressed.
* [[December 1]], [[1825]] &ndash; [[Nicholas I of Russia]] succeeds his older brother [[Alexander I of Russia|Alexander I]].
* [[June 14]]&ndash;[[June 15]], [[1826]] &ndash; [[The Auspicious Incident]]: [[Mahmud II]], [[sultan]] of [[Ottoman Empire]], crushes the last mutiny of [[Janissary|janissaries]] in [[Istanbul]].
* [[September 29]], [[1828]] &ndash; [[Russo-Turkish War, 1828–1829]]: [[Siege of Varna (1828)|Varna is taken]] by the Russian army.
* [[July 2]], [[1829]] &ndash; [[Russo-Turkish War, 1828–1829]]: Russian Field-Marshal [[Hans Karl von Diebitsch]] launches the Transbalkan offensive, which brings the Russian army within 68&nbsp;km of [[Istanbul]].
* [[September 16]], [[1829]] &ndash; [[Russo-Turkish War, 1828–1829]]: The [[Treaty of Adrianople (1829)|Treaty of Adrianople]] gains for Russia some territory at the mouth of the [[Danube]] and along the eastern coast of the [[Black Sea]].

==== Northern Europe ====
* [[February 3]], [[1825]] &ndash; [[Vendsyssel-Thy]], once part of the [[Jutland]] peninsula that formed westernmost Denmark, becomes an island after a flood drowns its 1&nbsp;km wide [[isthmus]].
* [[September 27]], [[1825]] - The world's first modern railway, the [[Stockton and Darlington Railway]], opens with engineer [[George Stephenson]] driving the first public train pulled by the steam engine ''[[Locomotion No 1]]''.<ref name="Pocket On This Day">{{cite book|title=Penguin Pocket On This Day|publisher=Penguin Reference Library|isbn=0-14-102715-0|year=2006}}</ref>
* [[September 4]], [[1827]] &ndash; [[Finland]]: The [[Great Fire of Turku]] destroys 3/4 of the city, with many human casualties.

==== Central Europe ====
* [[October 25]], 1820 &ndash;[[November 20]] &ndash; The [[Congress of Troppau]] ([[Opava]]) is convened between the rulers of Russia, Austria and [[Prussia]].
* October&ndash;December, [[1822]] &ndash; [[Congress of Verona]]: Russia, Austria and [[Prussia]] approve [[France|French]] intervention in Spain.
* [[July 6]], 1825 &ndash; The Duke of [[Schleswig-Holstein-Sonderburg-Beck]] gains possession of [[Glücksburg]] and changes his title to [[Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg]]. The line of [[Schleswig-Holstein-Sonderburg-Glücksburg]] later becomes the [[dynasty|royal house]] of [[Greece]], Denmark and Norway.

==== Southern Europe ====
* [[January 1]], 1820 &ndash; [[Trienio Liberal|A constitutionalist military insurrection]] at [[Cádiz]] leads to the summoning of the [[Spain|Spanish]] Parliament ([[March 7]]) (see [[Mid-nineteenth century Spain]]).
* [[March 9]], 1820 &ndash; King [[Ferdinand VII]] of Spain accepts the new constitution, beginning the Liberal Triennium ("Trienio Liberal").
* July 1820 &ndash; A [[Constitutionalist]] revolution occurs in the [[Kingdom of the Two Sicilies]].
* [[August 24]], 1820 &ndash; A [[Constitutionalist]] insurrection breaks out at [[Porto|Oporto]], [[Portugal]].
* [[September 15]], 1820 &ndash; A revolution breaks out in [[Lisbon]] (see [[History of Portugal#Crises of the nineteenth century|Portugal's crises of the Nineteenth Century]]).
* [[September 22]], [[1822]] &ndash; [[Portugal]] approves its first Constitution.<ref>{{Cite web|url=http://app.parlamento.pt/site_antigo/ingles/constitucionalism/const_monarchy/index.html|title=The Constitutional Monarchy|date=2013-10-22|website=Assembly of the Republic of Portugal|archive-url=https://web.archive.org/web/20131022105528/http://app.parlamento.pt/site_antigo/ingles/constitucionalism/const_monarchy/index.html|archive-date=22 October 2013|url-status=dead|access-date=2019-01-16}}</ref>
* [[January 4]], [[1825]] &ndash; King [[Ferdinand I of the Two Sicilies]] is succeeded by his son [[Francis I of the Two Sicilies]].
* [[May 28]], [[1826]] &ndash; [[Pedro I of Brazil]] abdicates as King of Portugal.
* [[June 23]], [[1828]] &ndash; [[History of Portugal|Portugal]]: King [[Miguel I of Portugal|Miguel I]] overthrows his niece Queen [[Maria II of Portugal|Maria II]], beginning the [[Liberal Wars]].

===== Greek War of Independence =====
[[File:Navarino.jpg|300px|thumb|right|[[October 20]]: ''Naval Battle of Navarino'' by [[Ambroise Louis Garneray]]]]
{{Main|Greek War of Independence|First Hellenic Republic}}
At the start of the decade, most of [[Greece]] was under the rule of the [[Ottoman Empire]], as it had been since 1453, despite frequent revolts.<ref>Woodhouse, ''A Story of Modern Greece'', 'The Dark Age of Greece (1453–1800)', p. 113, Faber and Faber (1968)</ref>  In early 1821, a secret organization called the [[Filiki Eteria]] instigated several battles that, together with the blessing of a Greek flag and proclamation of uprising by [[Germanos of Patras|Bishop Germanos of Patras]] on March 25, marked the beginning of the revolution.<ref>{{cite web|url=https://www.britannica.com/EBchecked/topic/1436276/Greek-Independence-Day|title=Greek Independence Day.|publisher= www.britannica.com |access-date=2009-09-09|quote= The Greek revolt was precipitated on March 25 (April 6 in Gregorian Calendar), 1821, when Bishop Germanos of Patras raised the flag of revolution over the Monastery of Agia Lavra in the Peloponnese. The cry "Freedom or Death" became the motto of the revolution. The Greeks experienced early successes on the battlefield, including the capture of Athens in June 1822, but infighting ensued. }}</ref><ref>{{cite book |author=Frazee, Charles A. |title=The Orthodox Church and independent Greece, 1821–1852 |publisher=CUP Archive |year=1969 |pages=[https://archive.org/details/orthodoxchurchin0000fraz/page/18 18–20] |isbn=0-521-07247-6 |quote=On 25 March, Germanos gave the revolution its great symbol when he raised a banner with the cross on it at the monastery of Ayia Lavra. |url=https://archive.org/details/orthodoxchurchin0000fraz/page/18 }}</ref><ref>{{cite book |author= McManners, John |title=The Oxford illustrated history of Christianity |publisher=Oxford University Press |year=2001 |pages=521–524 |isbn=0-19-285439-9 |quote= The Greek uprising and the church. Bishop Germanos of old Patras blesses the Greek banner at the outset of the national revolt against the Turks on 25 March 1821. The solemnity of the scene was enhanced two decades later in this painting by T. Vryzakis….The fact that one of the Greek bishops, Germanos of Old Patras, had enthusiastically blessed the Greek uprising at the onset (25 March 1821) and had thereby helped to unleash a holy war, was not to gain the church a satisfactory, let alone a dominant, role in the new order of things. }}</ref>  The uprising successfully established a foothold in the [[Peloponnese]], [[Siege of Tripolitsa|seizing Tripolitsa]] in September 1821, and had some success in [[Crete]], [[Macedonia (Greece)|Macedonia]] and [[Central Greece (geographic region)|Central Greece]].

Between 1821 and 1824, [[First National Assembly at Epidaurus|first]] and [[Second National Assembly at Astros|second]] national assemblies were held, and the constitutions [[Greek Constitution of 1822|of 1822]] and [[Greek Constitution of 1823|of 1823]] were established.  However, revolutionary activity was fragmented, resulting in the [[Greek civil wars of 1824–1825|civil wars of 1824–1825]].  The Greek side withstood the Turkish attacks because, during this period, the Ottoman military campaigns were periodic and uncoordinated.

That changed when the Ottoman Sultan [[Mahmud II]] negotiated with [[Mehmet Ali of Egypt]], who agreed to send his son [[Ibrahim Pasha of Egypt|Ibrahim Pasha]] to Greece with an army to suppress the revolt in return for territorial gain. Ibrahim landed in the [[Peloponnese]] in February 1825 and secured most of the peninsula by the end of 1825.  He then helped break the [[Third Siege of Missolonghi|siege of Missolonghi]].  Although Ibrahim was [[Ottoman–Egyptian Invasion of Mani|defeated in Mani]], he had succeeded in suppressing most of the revolt in the Peloponnese and [[Athens]] had been retaken.

Following years of negotiation, three Great Powers, [[Russian Empire|Russia]], the United Kingdom and [[France]] had come to agree to the formation of an autonomous Greek state under Ottoman [[suzerainty]], as stipulated in the [[Treaty of London (1827)|Treaty of London]]. Ottoman refusal to accept these terms led to the [[Battle of Navarino]], which effectively secured complete Greek independence.  That year, the [[Third National Assembly at Troezen]] established the [[First Hellenic Republic]].  With the help of a [[Morea expedition|French expeditionary force]], the Greeks drove the Turks out of the Peloponnese and proceeded to the captured part of Central Greece by 1828. As a result of years of negotiation, Greece was finally recognized as an independent nation in May 1832.

==== Western Europe ====
===== United Kingdom =====
In the 1820s, the British government was formally headed by [[George IV of the United Kingdom|King George IV]], but in practice, was led by his [[Prime Minister of the United Kingdom|prime minister]]s [[Robert Banks Jenkinson, 2nd Earl of Liverpool|Lord Liverpool]] (1812–1827), [[George Canning]] (1827), [[Frederick John Robinson, 1st Viscount Goderich|Lord Goderich]] (1827–1828), and [[Arthur Wellesley, 1st Duke of Wellington|Duke of Wellington]] (1828–1830).  This decade was largely peaceful for Britain, with some foreign intervention.  The British supported the Portuguese liberals in the [[Liberal Wars]], and supported Greek rebels in the [[Greek War of Independence|war for independence]].  During this time, [[London]] became the largest city of the world, taking the lead from [[Beijing]].<ref>{{cite web|url=http://geography.about.com/library/weekly/aa011201a.htm|title=Largest Cities Through History|work=About.com Geography|access-date=2011-06-29|archive-date=2016-08-18|archive-url=https://web.archive.org/web/20160818124242/http://geography.about.com/library/weekly/aa011201a.htm|url-status=dead}}</ref>

Domestic tensions ran high at the start of the decade, with the [[Peterloo Massacre]] (1819), the [[Cato Street Conspiracy]] (1820), and the [[Radical War]] (1820) in Scotland.  However, by the end of the 1820s, many repressive laws were repealed.  In 1822, Britain repealed the [[death penalty]] for over 100 crimes, and punishments such as [[Hanged, drawn and quartered|drawing and quartering]] and [[flagellation]] fell out of use. [[Seditious Meetings Act 1819|Seditious Meetings prevention Act]] (barring large assemblies) and the [[Combination Act 1799|Combination Act]] (banning trade unions) were repealed in 1824. The [[Roman Catholic Relief Act 1829|Roman Catholic Relief Act]] by [[Parliament of the United Kingdom]] granted a substantial measure of [[Catholic emancipation]] in Britain and [[History of Ireland (1801–1923)#Catholic emancipation|Ireland]].<ref name="Pocket On This Day"/>

===== France =====
* [[May 5]], [[1821]] &ndash; Emperor [[Napoleon]] I dies in exile on [[Saint Helena]] of stomach cancer.
* [[September 16]], 1824 &ndash; [[Charles X of France|Charles X]] succeeds his brother [[Louis XVIII]] as King of France.
* [[January 4]], [[1828]] &ndash; [[History of France|France]]: The [[Jean Baptiste Gay, vicomte de Martignac|Vicomte de Martignac]] succeeds the [[Jean-Baptiste Guillaume Joseph, comte de Villèle|Comte de Villèle]] as [[Prime Minister of France]].
* [[August 8]], [[1829]] &ndash; [[History of France|France]]: The [[Prince de Polignac]] succeeds the [[Jean Baptiste Gay, vicomte de Martignac|Vicomte de Martignac]] as [[Prime Minister of France]].

=== Africa ===
[[File:1827 Finley Map of Africa - Geographicus - Africa-finley-1827.jpg|thumb|left|Anthony Finley's 1827 map of Africa]]
* [[February 6]], 1820: 86 free [[African American]] colonists sail from [[New York City]] to [[Freetown, Sierra Leone]].
* [[Americo-Liberian]]s begin to settle in the Colony of [[Liberia]] with the support of the [[American Colonization Society]]
* [[June 14]], 1821 &ndash; King [[Badi VII]] of [[Funj sultanate of Sinnar|Sennar]] surrenders his throne and realm to Ismail Pasha, general of the [[Ottoman Empire]], ending the existence of that Sudanese kingdom.
* [[1822]] &ndash; The first group of freed slaves from the United States arrive in modern-day [[Liberia]] and found [[Monrovia]] (see [[History of Liberia]]).
* [[January 22]], 1824 &ndash; The [[Ashanti people|Ashanti]] crush [[United Kingdom|British]] forces in the [[Gold Coast (British colony)|Gold Coast]], killing the British governor [[Charles MacCarthy (British Army officer)|Sir Charles MacCarthy]] (see also [[History of Ghana#British Dominance|Wars between Britain and Ashanti in Ghana]] and [[Ashanti Confederacy]]).
* [[August 18]], [[1826]] &ndash; Explorer [[Alexander Gordon Laing]] becomes the first European to reach [[Timbuktu]].<ref name="Pocket On This Day"/>
* April [[1827]] &ndash; [[History of Ottoman Algeria|Ottoman Algeria]]: Husain Dei slaps the [[France|French]] [[consul]] Decalina on the face, eventually leading to war and [[French rule in Algeria]].

=== North America ===
==== British North America ====
* [[July 8]], [[1822]] &ndash; The [[Chippewas]] turn over huge tract of land in [[Ontario]] to the United Kingdom.
* [[November 30]], 1824 &ndash; The first sod is turned in [[Ontario]], for the first of four [[Welland Canal]]s (the canal opens for a trial run exactly 5 years later to the day).

==== United States ====
[[File:1823 Melish Map of the United States of America - Geographicus - USA-melish-1822.jpg|thumb|right|[[John Melish]] map of the United States circa 1822]]
At the beginning of the 1820s, the United States stretched from the Atlantic Ocean through to (roughly) the western edge of the Mississippi basin, though Florida, Michigan, Wisconsin and all present-day states fully west of the Mississippi had yet to be granted statehood.  Two states were admitted to the union during this decade: [[Maine]] in 1820 and [[Missouri]] in 1821.  The [[Adams–Onís Treaty]], signed in 1819 and ratified by Spain in 1821, ceded Florida (already conquered by USA in [[1818]]) to the United States, and established a boundary between [[New Spain]] and the United States.

Slavery was widespread throughout the southern United States.  According to the [[1820 United States census|1820 U.S. Census]], the slave population at that time was 1,538,000.<ref name="Historic US Census data">{{cite web|url=https://www.census.gov/population/www/censusdata/hiscendata.html|title=Selected Historical Decennial Census Population and Housing Counts|author=Population Division|publisher=US Census}}</ref>  The [[Missouri Compromise]] of 1820 prohibited slavery in the former [[Louisiana Territory]] north of the [[parallel 36°30′ north]] except within the boundaries of the proposed state of [[Missouri]].  By the [[1830 United States census|1830 U.S. Census]], the slave population had risen to 2,009,043.<ref name="Historic US Census data"/>  With the coordination of the [[American Colonization Society]], many freed African-Americans repatriated to Africa during this decade to the newly formed colony of [[Liberia]].

The political mood at the start of the 1820s was referred to as the [[Era of Good Feelings]], following the collapse of the [[Federalist]] party. [[James Monroe]], the sitting U.S. president since 1817, was [[U.S. presidential election, 1820|re-elected in 1820]], virtually unopposed.  In 1823, Monroe introduced the [[Monroe Doctrine]] in the [[State of the Union Address]], declaring that any European attempts to recolonize the Americas would be considered a hostile act towards the United States.

The feeling of unity during the Monroe administration was dispelled in [[U.S. presidential election, 1824|the presidential election of 1824]], which due to an Electoral College stalemate, was decided in the [[United States House of Representatives]]. [[John Quincy Adams]] was chosen as the sixth U.S. president, despite receiving only 30.9% of the popular vote to Andrew Jackson's 41.3%.  This gave rise to [[Jacksonian Democracy|Jacksonian Nationalism]] and the rise of the modern [[Democratic Party (United States)|Democratic Party]],<ref>Brown, 1966, p. 22</ref> with [[Andrew Jackson]] elected in [[1828 United States presidential election|the 1828 election]].

==== Mexico ====
{{Main|Mexican War of Independence|First Mexican Empire|United Mexican States (1824–1864)}}

After ten years of civil war in Mexico (then called the "[[New Spain|Viceroyalty of New Spain]]") and the death of two of its founders, by early 1820 the Mexican independence movement was stalemated and close to collapse.  However, the [[Army of the Three Guarantees]] was formed under the command of Colonel [[Agustín de Iturbide]] with the support of patriots and loyalists to secure independence for Mexico and the protection of Roman Catholicism.  Iturbide's army was joined by rebel forces from all over Mexico, and quickly gained control of Mexico. On August 24, 1821, representatives of the Spanish crown and Iturbide signed the [[Treaty of Córdoba]], which recognized the [[First Mexican Empire|Mexican Empire]] under the terms of the [[Plan of Iguala]].

On September 27 the Army of the Three Guarantees entered Mexico City, and the following day Iturbide proclaimed the independence of the Mexican Empire.  The newly formed Mexican congress eventually declared Iturbide emperor of Mexico on May 19, 1822.  Later that year, Iturbide dissolved Congress and replaced it with a sympathetic junta.  However, on [[March 19]], 1823 Iturbide abdicated.

The [[United Mexican States (1824–1864)|First Federal Republic]] was established on October 4, 1824. In the new constitution, the republic took the name of [[Mexico|United Mexican States]], and was defined as a representative [[federal republic]], with [[Roman Catholic Church|Catholicism]] as the [[Confessional state|official and unique religion]].<ref name="const.1824">{{Cite web|url=http://tarlton.law.utexas.edu/constitutions/text/1824index.html|archiveurl=https://web.archive.org/web/20120318225631/http://tarlton.law.utexas.edu/constitutions/text/1824index.html|url-status=dead|title=Federal Constitution of the United Mexican States (1824)|archivedate=March 18, 2012}}</ref>
[[Guadalupe Victoria]] was the first President of Mexico from 1824 until 1829.

After [[Manuel Gómez Pedraza]] won the election to succeed Victoria, [[Vicente Guerrero]] staged a [[coup d'état]] and took the presidency on April 1, 1829.<ref name="The Majestic Life of President Vicente Ramon Guerrero">{{cite web|last=Katz|first=William Loren|title=The Majestic Life of President Vicente Ramon Guerrero |url=http://www.cwo.com/~lucumi/guerrero.html|publisher=William Loren Katz|access-date=6 June 2010}}</ref>  Guerrero was deposed in a rebellion under Vice-president [[Anastasio Bustamante]] in December 1829.

=== Caribbean ===
* [[December 1]], 1821 &ndash; The [[Dominican Republic]] declares independence from Spain only to be invaded by [[Haiti]] in 1822 (see [[History of the Dominican Republic]]).
* [[February 9]], [[1822]] &ndash; The [[invasion|invading]] [[Haiti]]an forces led by [[Jean-Pierre Boyer]] arrive in [[Santo Domingo]], to overthrow the newly founded [[Dominican Republic|Republic]].
* [[April 17]], [[1825]] &ndash; [[Charles X of France]] recognizes [[Haiti]], 21 years after it expelled the French following the successful [[Haitian Revolution]], and demands the payment of 150 million gold francs, 30 million of which Haiti must finance through France itself, as down payment.

=== Central America ===
* [[February 20]], 1820 &ndash; A revolt begins in [[Santa María Chiquimula]], [[Totonicapán Department|Totonicapán department]] of [[Guatemala]].
* The [[United Provinces of Central America]] were formed in 1823.
* [[September 15]], 1821 &ndash; [[Guatemala]], [[El Salvador]], [[Honduras]], [[Nicaragua]] and [[Costa Rica]] gain independence from Spain (see [[History of Central America#Independence|History of Central America]]).
* [[November 28]], 1821 &ndash; [[Panama]] declares independence from Spain (see [[History of Panama#Spanish colonial period|History of Panama]]).
* [[July 1]]&ndash; The congress of Central America declares absolute independence from Spain, Mexico, and any other foreign nation, including [[North America]] and a Republican system of government is established.
* [[June 22]], [[1826]] &ndash; The [[Pan-Americanism|Pan-American]] [[Congress of Panama]] tries (unsuccessfully) to unify the [[Americas|American]] republics.

=== South America ===
[[File:BatallaCarabobo01.JPG|right|thumb|''La Batalla de Carabobo'' by [[Martín Tovar y Tovar]], depicting the Battle of Carabobo, in which Simón Bolívar secured Venezuela's independence from Spain in 1821]]

==== Gran Colombia ====
* [[October 9]], 1820 &ndash; [[Guayaquil]] declares independence from Spain (see also [[History of Ecuador]]).
* [[June 24]], 1821 &ndash; [[Battle of Carabobo]]: [[Simón Bolívar]] wins [[Venezuela]]'s independence from Spain (see [[History of Venezuela#19th century: independence|Venezuela's independence]]).
* [[September 7]], 1821 &ndash; The [[Republic of Gran Colombia]] (a [[federation]] covering much of present-day [[Venezuela]], [[Colombia]], [[Panama]], and [[Ecuador]]) is established, with [[Simón Bolívar]] as the founding [[President (government title)|President]] and [[Francisco de Paula Santander]] as [[vice president]].
* [[May 24]], [[1822]] &ndash; [[Battle of Pichincha]]: [[Simón Bolívar]] secures the independence of [[Quito]].
* [[July 26]], [[1822]] &ndash; [[José de San Martín]] arrives in [[Guayaquil]], [[Ecuador]], to [[Guayaquil conference|meet]] with [[Simón Bolívar]].
* [[July 27]], [[1822]] &ndash; [[Simón Bolívar]] and [[General]] [[José de San Martín]] meet in [[Guayaquil]]. Bolívar later annexes [[Guayaquil]] (See [[Guayaquil Conference]]).
* [[June 3]], [[1828]] &ndash; [[Gran Colombia – Peru War]]: President [[Simón Bolívar]] declares war on Peru.
* [[August 27]], [[1828]] &ndash; [[Simón Bolívar]] declares himself dictator of Gran Colombia.

==== Bolivia ====
* [[August 6]], 1825 &ndash; [[Bolivia]] [[Bolivian War of Independence|gains its independence]] from Spain as a [[republic]] with the instigation of [[Simón Bolívar]].

==== Peru ====
* [[July 28]], 1821 &ndash; [[Peru]] declares independence from Spain (see [[History of Peru#Wars of independence (1811–1824)|Peru's Independence from Spain]]).
* [[September 10]], 1823 &ndash; [[Simón Bolívar]] is named President of [[Peru]].
* [[February 10]], 1824 &ndash; [[Simón Bolívar]] is proclaimed [[dictator]] of [[Peru]].
* [[December 9]], 1824 &ndash; [[Battle of Ayacucho]]: Peruvian forces defeat the Spanish.
* [[February 10]], [[1825]] &ndash; [[Simón Bolívar]] gives up his title of [[dictator]] of Peru and takes the alternative title of ''Liberator''.

==== Brazil ====
* 1822: [[Brazil]] gains independence
* [[September 7]], [[1822]] &ndash; [[Brazil]] declares its independence from [[Portugal]] (see [[Empire of Brazil#Brazilian independence|Brazilian independence]]).
* [[October 12]], [[1822]] &ndash; [[Peter I of Brazil]] is declared the constitutional [[emperor]] of the [[Empire of Brazil|Brazilian Empire]].
* [[December 1]], [[1822]] &ndash; [[Peter I of Brazil|Peter I]] is crowned as [[Emperor]] of [[Brazil]] (see [[Empire of Brazil#The reign of Pedro I, 1822–31|The reign of Pedro I, 1822–31]]).
* [[April 26]], [[1828]] &ndash; Treaty of Commerce and Navigation signed between [[Brazil]] and Denmark, establishing diplomatic relations between the two countries.<ref>{{cite book|url=https://books.google.com/books?id=FZsAAAAAYAAJ&pg=PA717|title=British and Foreign State Papers|year=1829|publisher=Great Britain. Foreign Office |via=Harvard University}}</ref>

==== Argentina–Brazil War ====
* [[March 7]], [[1827]] &ndash; [[Brazil]]ian marines sail up the [[Río Negro (Argentina)|Rio Negro]] and attack the temporary naval base of [[Carmen de Patagones]], [[Argentina]]; they are defeated by the local citizens.
* [[April 7]]&ndash;[[April 8]], [[1827]] &ndash; [[Battle of Monte Santiago]]: A squadron of the Brazilian Imperial Navy defeats [[Argentina|Argentine]] vessels in a major naval engagement.
* [[February 20]], [[1827]] &ndash; [[Battle of Ituzaingo]] (Passo do Rosário): A force of the Brazilian Imperial Army meets [[Argentina|Argentine]]–[[Uruguay]]an troops in combat.
* [[August 27]], [[1828]] &ndash; [[History of South America|South America]]: [[Brazil]] and [[Argentina]] recognize the [[History of Uruguay#Struggle for independence, 1811–1828|independence of Uruguay]].

==== Uruguay ====
* [[July 18]], 1825 &ndash; [[Uruguay]] declares independence from [[Brazil]] (see [[History of Uruguay#Struggle for independence, 1811–1828|Uruguay's independence]]).
* [[August 27]], [[1828]] &ndash; [[History of South America|South America]]: [[Brazil]] and [[Argentina]] recognize the [[History of Uruguay#Struggle for independence, 1811–1828|independence of Uruguay]].

==== Argentina ====
* 1820: The [[Argentine Confederation]] ([[Argentina]]) establishes a [[penal colony]] in the [[Falkland Islands|Malvinas]].
* [[February 8]], [[1826]] &ndash; Unitarian [[Bernardino Rivadavia]] becomes the first President of [[Argentina]].

==== Chile ====
* [[February 6]], 1820 &ndash; [[Thomas Cochrane, 10th Earl of Dundonald|Lord Cochrane]] [[Capture of Valdivia|occupies Valdivia]] in the name of the Republic of [[Chile]].
* [[September 4]], 1821 &ndash; [[Chile]]an general [[José Miguel Carrera]] is executed by an Argentinian military tribunal in the city of [[Mendoza, Argentina|Mendoza]].

=== Pacific Islands ===
* [[August 21]], 1821 &ndash; [[Jarvis Island]] is discovered by the crew of the Eliza Frances.
* [[July 14]], [[1827]] &ndash; [[Kingdom of Hawaii]]: The [[Roman Catholic Diocese of Honolulu|Diocese of Honolulu]] is founded.

== Economics and commerce ==
* 1821: High-quality [[cotton]] is introduced in [[Egypt]].
* [[1822]] &ndash; [[Ashley's Hundred]] leave from [[St. Louis, Missouri|St. Louis]], setting off a major increase in [[fur trade]].
* [[1822]] &ndash; [[Coffee]] is no longer banned in Sweden.
* 1824 &ndash; The construction of [[Fort Vancouver]] trading post started on the North shore of the lower [[Columbia River]] by the [[Hudson's Bay Company]]. Inauguration occurred the following year when [[Fort Astoria|Fort George]] was closed.
* [[August 18]], 1825 &ndash; [[Gregor MacGregor]] issues a £300,000 loan with 2.5% interest through the London bank of Thomas Jenkins & Company.  His actions lead to the [[Panic of 1825]], the first modern [[stock market crash]] in London.

=== Slavery, serfdom and labor ===
* [[March 3]], 1820 and [[March 6]], 1820 &ndash; [[Slavery]] in the United States: The [[Missouri Compromise]] becomes law.
* 1820: [[Robert Owen]] devises the [[labour voucher]].
* 1820: 18,957 black slaves leave [[Luanda]], [[Angola]].
* [[1828]] &ndash; 32,000 [[Angola]]ns are sold in [[Rio de Janeiro]], [[Brazil]].
* [[June 5]], [[1829]] &ndash; [[History of slavery|Slave trade]]: {{HMS|Pickle}} captures the armed slave ship ''Voladora'' off the coast of [[Cuba]].

== Science and technology ==
[[File:BabbageDifferenceEngine.jpg|thumb|250px|right| [[1822]]: [[Charles Babbage|Babbage's]] [[Difference engine]].]]
* [[January 28]], 1820 &ndash; A [[Imperial Russia|Russia]]n expedition led by [[Fabian Gottlieb von Bellingshausen]] and [[Mikhail Petrovich Lazarev]] approaches the [[Antarctica|Antarctic coast]] (see [[History of Antarctica]]).
* [[January 30]], 1820 &ndash; [[Edward Bransfield]] lands on the [[Antarctica|Antarctic mainland]] (see [[History of Antarctica]]).
* April 1820 &ndash; [[Hans Christian Ørsted]] discovers the relationship between [[electricity]] and [[magnetism]].
* [[May 11]], 1820 &ndash; {{HMS|Beagle}} (the ship that later takes young [[Charles Darwin]] on his scientific voyage) is launched.
* 1820: The 6th edition of the ''[[Encyclopædia Britannica]]'' appears.
* [[June 14]], [[1822]] &ndash; [[Charles Babbage]] proposes a [[Difference engine]].
* [[1822]] &ndash; [[Egyptian hieroglyph|Hieroglyphs]] are deciphered by [[Thomas Young (scientist)|Thomas Young]] and [[Jean-François Champollion]], using the [[Rosetta Stone]].
* [[1822]] &ndash; [[Galileo Galilei]]'s [[Dialogue Concerning the Two Chief World Systems|''Dialogue'']] is taken off the ''[[Index Librorum Prohibitorum]]'', the [[Roman Catholic Church]]'s list of banned books.
* [[1822]] &ndash; The [[Graham Cracker]] is developed in [[Bound Brook, New Jersey]] by the [[Presbyterian]] minister [[Sylvester Graham]].
[[File:Untitled (point de vue), Niépce 1827 — HRC 2020 (cropped).jpg|thumb|300px|right|The oldest surviving photograph, Nicéphore Niépce, circa 1826]]
* 1823 &ndash; [[Olbers' paradox]] is described by the [[Germany|German]] [[astronomer]] [[Heinrich Wilhelm Olbers]].
* [[January 8]], 1824 &ndash; After much controversy, [[Michael Faraday]] is finally elected as a member of the [[Royal Society]] with only one vote against him.
* [[October 21]], 1824 &ndash; [[Joseph Aspdin]] patents [[Portland Cement]].
* 1824 &ndash; The [[Panoramagram]] is developed, creating the first volumetric display.
* 1824- [[Gideon Mantell]] and [[Mary Anning]] discover an [[Iguanodon]] tooth and [[Megalosaurus]] skeletons not far from their home in England giving birth to [[Paleontology]].
* [[1825]] &ndash; [[Hans Christian Ørsted]] reduces [[aluminium chloride]] to make [[aluminium]].
* June [[1826]] &ndash; [[History of photography|Photography]]: [[Nicéphore Niépce]] makes a true photograph.
* [[1826]] &ndash; [[Aniline]] is first isolated from the destructive distillation of [[indigo]] by [[Otto Unverdorben]].
* [[May 25]], [[1827]] &ndash; [[Romania]]n inventor [[Petrache Poenaru]] receives a [[France|French]] [[patent]] for the invention of the first [[fountain pen]] with a replaceable ink cartridge.
* [[1827]] &ndash; [[Englishman]] [[John Walker (inventor)|John Walker]] invents the first [[Match|friction match]] which he names ''Lucifer''.
* [[1828]] &ndash; [[Friedrich Woehler|Friedrich Wöhler]] synthesizes [[urea]], implicitly discrediting a cornerstone of [[vitalism]].
* [[1828]] &ndash; [[Ányos Jedlik]] creates the world's first [[electric motor]].
* [[1828]] &ndash; Casparus van Houten Sr. (father of [[Coenraad Johannes van Houten]]) [[patent]]s an inexpensive method for pressing [[cocoa butter]] from roasted [[cocoa bean]]s,<ref>{{cite web|url=http://home.zonnet.nl/daniellerenkema/25ste-pagina.html |title=Onderzoekers in actie: Peter van Dam De geschiedenis van de firma Van Houten Cacao |access-date=2008-05-25 |language=nl |url-status=dead |archive-url=https://web.archive.org/web/20070927000124/http://home.zonnet.nl/daniellerenkema/25ste-pagina.html |archive-date=2007-09-27 }}</ref> leaving [[cocoa solids]].  This is an important step in modern solid [[chocolate]] production.
* [[May 6]], [[1829]] &ndash; The patent for an instrument called the [[accordion]] is applied for by [[Cyrill Demian]]  (Officially approved on [[May 23]].)
* [[July 23]], [[1829]] &ndash; In the United States, [[William Austin Burt|William Burt]] obtains the first [[patent]] for a form of [[typewriter]].

== Transportation ==
* [[1825]] &ndash; The first horse-drawn [[bus|omnibus]]es established in [[London]].
* [[September 27]], 1825 &ndash; The world's first modern railway, the [[Stockton and Darlington Railway]], opens in [[England]].
* [[October 26]], [[1825]] &ndash; The [[Erie Canal]] opens, providing passage from [[Albany, New York]] to [[Buffalo, NY|Buffalo]] and [[Lake Erie]].
* 1825: The [[Ohio and Erie Canal]] is dug to extend settlement access and commercial traffic to the [[Ohio River]].
* [[January 30]], [[1826]] &ndash; The [[Menai Suspension Bridge]], built by engineer [[Thomas Telford]], is opened between the island of [[Anglesey]] and the mainland of [[Wales]].
* [[April 1]], [[1826]] &ndash; [[Samuel Morey]] patents the [[internal combustion engine]].
* [[October 1]], [[1826]] &ndash; Opening of the [[Monkland and Kirkintilloch Railway]] in Scotland.<ref>{{cite book|author=Awdry, Christopher|year=1990|title=Encyclopaedia of British Railway Companies|publisher=Patrick Stephens Ltd|location=Wellingborough|isbn=1-85260-049-7}}</ref>
* [[September 21]], [[1826]] &ndash; Construction of the [[Rideau Canal]] begins in Canada.
* [[October 7]], [[1826]] &ndash; The first train operates over the [[Granite Railway]] in [[Massachusetts]].<ref name=EB>{{cite encyclopedia| url=https://www.britannica.com/EBchecked/topic/241709/Granite-Railway| title=Granite Railway| encyclopedia=Britannica Online Encyclopedia| access-date=2008-05-19}}</ref><ref name=Elks>{{cite web| url=http://catskillarchive.com/rrextra/abnegr1.Html| title=The First Railroad in America| publisher=Granite City B.P.O.E. - Quincy Lodge No. 943| work=Catskill Archive| year=1924| access-date=2008-05-19}}</ref>
* [[1826]] &ndash; The first [[railway tunnel]] is built en route between [[Liverpool]] and [[Manchester]] in [[England]].
* [[February 28]], [[1827]] &ndash; The [[Baltimore and Ohio Railroad]] is incorporated, becoming the first [[railroad]] in United States offering commercial transportation of both people and freight.
* [[April 26]]&ndash;[[May 24]], 1827 - The [[Royal Netherlands Navy]]'s British-built [[paddle steamer]] ''[[Steamboat#Ocean-going steamships|Curaçao]]'' makes the first [[Transatlantic Crossing]] by steam, from [[Hellevoetsluis]] to [[Paramaribo]].<ref>{{cite web|title=Steamship Curaçao|url=http://www.vrcurassow.com/2dvrc/sscuracao/sscuracao.html|access-date=2011-02-02| archive-url= https://web.archive.org/web/20101224202256/http://vrcurassow.com/2dvrc/sscuracao/sscuracao.html| archive-date= 24 December 2010 | url-status= live}}</ref>
* [[July 4]], [[1829]] &ndash; [[George Shillibeer]] begins operating the first [[bus]] service in London.<ref name="Icons">{{cite web|url=http://www.icons.org.uk/theicons/icons-timeline/1820-1840 |title=Icons, a portrait of England 1820–1840 |access-date=2007-09-12 |archive-url=https://web.archive.org/web/20070922055840/http://www.icons.org.uk/theicons/icons-timeline/1820-1840 |archive-date=22 September 2007 |url-status=dead }}</ref>
* [[October 8]], [[1829]] &ndash; [[1829 in rail transport|Rail transport]]: [[George Stephenson|Stephenson]]'s ''[[Stephenson's Rocket|Rocket]]'' wins the [[Rainhill Trials]].
* [[November 30]], [[1829]] &ndash; The original [[Welland Canal]] opens for a trial run with a ceremony at Port Dalhousie.

== Culture ==

=== Literature ===
* 1824–1825: ''[[American Writers]]'' by [[John Neal]], the earliest history of [[American literature]], is published in ''[[Blackwood's Magazine]]''<ref>{{cite book | last = Sears | first = Donald A. | title = John Neal | publisher = Twayne Publishers | location = Boston, Massachusetts | year = 1978 | isbn = 978-0-8057-7230-2 | page = 72}}</ref>

=== Music ===
* [[February 3]], 1823 &ndash; [[Gioachino Rossini]]'s ''[[Semiramide]]'' is first performed.
* [[April 13]], 1823 &ndash; Eleven-year-old [[Franz Liszt]] gives a concert after which he is personally congratulated by [[Ludwig van Beethoven]].
* [[May 7]], 1824 &ndash; One of [[Beethoven]]'s most notable pieces, his ''[[Symphony No. 9 (Beethoven)|Symphony No. 9]]'', premieres in [[Vienna]].
* Early July, [[1826]] &ndash; [[Ludwig van Beethoven]] puts the finishing touches on the ''[[String Quartet No. 14 (Beethoven)|String Quartet in C sharp Minor]], Opus 131''.
* [[1826]] &ndash; [[Ludwig van Beethoven]] composes the [[Große Fuge]].
* [[March 11]], [[1829]] &ndash; [[Felix Mendelssohn]] performs [[Bach]]'s [[St Matthew Passion]].
* April&ndash;September &ndash; [[Felix Mendelssohn]] pays his first visit to Britain. This includes the first [[London]] performance of his [[concert overture]] to ''[[A Midsummer Night's Dream (Mendelssohn)|A Midsummer Night's Dream]]'' and his trip to [[Fingal's Cave]].<ref>{{cite journal|first=George|last=Grove|author-link=George Grove|title=Mendelssohn's Scotch Symphony|jstor=904111|journal=[[The Musical Times]]|volume=45|issue=740|date=1 October 1904|page=644|doi=10.2307/904111|url=https://zenodo.org/record/2346693}}</ref>

=== Art ===
* 1820: ''[[Venus de Milo]]'' is found on the island of [[Melos]] ''(Milos)''.

=== Poetry ===
* 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
* 1826: [[Felicia Hemans]] publishes [[Casabianca (poem)|Casabianca]], a poem commemorating the sinking of a French ship called the [[Orient]] during [[The Battle of the Nile]] in 1798.

=== Sports ===
* 1823 &ndash; [[William Webb Ellis]] "invents" [[Rugby football]].
* [[August 10]], [[1826]] &ndash; The first [[Cowes Regatta]] is held on the [[Isle of Wight]] in the UK.<ref name="Icons"/>
* [[June 10]], [[1829]] &ndash; The [[Oxford University Boat Club]] wins the very first [[Rowing (sport)|boat race]].<ref name="Pocket On This Day"/><ref>{{Cite web|url=https://theboatrace.org/origins|archiveurl=https://web.archive.org/web/20111127133710/http://www.theboatrace.org/article/introduction/history|url-status=dead|title=Origins Of The Boat Races|archivedate=November 27, 2011}}</ref>
* [[August 10]], [[1829]] &ndash; First ascent of [[Finsteraarhorn]], the highest summit of the [[Bernese Alps]].

=== Theatre ===
* [[January 19]], [[1829]] &ndash; [[Ernst August Friedrich Klingemann|August Klingemann]]'s adaptation of [[Johann Wolfgang von Goethe]]'s ''[[Goethe's Faust|Faust]]'' premieres in [[Braunschweig]].<ref name="Armstrong1881">{{cite book|author=Richard Acland Armstrong|title=The Modern review|url=https://archive.org/details/modernreview01armsgoog|access-date=27 November 2011|year=1881|publisher=J. Clarke & Co.|pages=[https://archive.org/details/modernreview01armsgoog/page/n163 152]–}}</ref>

=== Fashion ===
[[File:1822-Millinery-shop-Paris-Chalon.jpg|thumb|160px|right|A millinery shop in Paris, 1822]]
{{Main|1820s in fashion}}

During the 1820s in European and European-influenced countries, fashionable women's clothing styles transitioned away from the classically influenced "Empire"/"Regency" styles of ca. [[1795–1820 in fashion|1795–1820]] (with their relatively unconfining [[empire silhouette]]) and re-adopted elements that had been characteristic of most of the 18th century (and were to be characteristic of the remainder of the 19th century), such as full skirts and clearly visible [[corset]]ing of the natural waist.

The silhouette of men's fashion changed in similar ways: by the mid-1820s [[coat (clothing)|coats]] featured broad shoulders with puffed sleeves, a narrow waist, and full skirts. [[Trousers]] were worn for smart day wear, while [[breeches]] continued in use at court and in the country.

=== Miscellaneous ===
* [[May 26]], [[1828]] &ndash; [[Feral child]]: [[Kaspar Hauser]] is discovered in [[Nuremberg]], Germany.
* [[1822]] [[Jean-François Champollion]] cracks the [[Hieroglyph|hieroglyphic code]] by using the [[Rosetta Stone]].

== Establishments ==
* [[July 20]], 1820 &ndash; [[Saint Cronan's Boys National School]] opens in [[Bray, County Wicklow]], [[Republic of Ireland|Ireland]] under the title ''Bray Male School''. It is the oldest school in Bray and its notable past pupils include the former [[president of Ireland]], [[Cearbhall Ó Dálaigh]].
* 1820: [[Indiana University]] is founded as the Indiana State Seminary and renamed the Indiana College in 1846, to later be renamed [[Indiana University]].
* [[February 9]], 1821 &ndash; [[The George Washington University]] is chartered as The Columbian College of the District of Columbia by President Monroe.
* [[June 27]], 1821 &ndash; The [[New Hampton School]] is founded in the United States state of [[New Hampshire]].
* [[September 18]], 1821 &ndash; [[Amherst College]] is founded in [[Massachusetts]].
* [[1822]] &ndash; [[Aban Palace]] is completed.
* [[August 12]], [[1822]] &ndash; [[University of Wales, Lampeter|St David's College]] (now the [[University of Wales, Lampeter]]) is founded by [[Bishop]] [[Thomas Burgess (bishop, born 1756)|Thomas Burgess]].
* [[November 13]], [[1822]] &ndash; founding of the [[Congregation of St. Basil]]
* [[June 5]], 1823 &ndash; [[Raffles Institution]], then the Singapore Institution, was founded by the founder of Singapore, Sir Stamford Raffles.
* 1823 &ndash; Jackson Male Academy, precursor of [[Union University]], is founded in [[Tennessee]].
* 1823 &ndash; The [[Oxford Union]] is founded.
* [[January 24]], 1824 &ndash; [[The Westminster Review]], No1. is published.
* [[June 16]], 1824 &ndash; [[Royal Society for the Prevention of Cruelty to Animals|Society for the Prevention of Cruelty to Animals]] is established in [[Great Britain]].
* [[October 10]], 1824 &ndash; The [[Edinburgh]] Town Council makes a decision to found the Edinburgh Municipal Fire Brigade, the first [[fire brigade]] in Britain.
* [[November 5]], 1824 &ndash; [[Rensselaer Polytechnic Institute]] (the first [[technological university]] in the English-speaking world) is founded in [[Troy, New York]].
* [[December 24]], 1824 &ndash; The First American Fraternity, [[Chi Phi]] (ΧΦ), is founded at Princeton University.
* 1824 &ndash; The ''[[Cimetière du Montparnasse]]'' is established in [[Paris]], France.
* September 1825 &ndash; The [[Lady Margaret Boat Club]] is founded by 12 members of [[St John's College, Cambridge]].
* [[1825]] &ndash; The [[Brisbane|City of Brisbane]] is founded (see [[History of Brisbane]]).
* [[1825]] &ndash; The [[United States Postal Service]] started a [[dead letter office]].
* [[February 11]], [[1826]] &ndash; [[University College London]] is founded, under the name ''University of London''.
* [[February 13]], [[1826]] &ndash; The [[American Temperance Society]] is founded.
* [[March 16]], [[1827]] &ndash; ''[[Freedom's Journal]]'', the first [[African-American]] owned and published newspaper in the United States, is founded in [[New York City]] by [[John Russwurm]].
* [[1827]] &ndash; [[Egypt]]: [[Cairo University School of Medicine]] is established as the first African medical school in the Middle East.
* [[1827]] &ndash; [[John James Audubon|J. J. Audubon]] begins publishing ''[[Birds of America (book)|Birds of America]]''.
* [[April 11]], [[1828]] &ndash; [[Bahía Blanca]] is founded.
* [[June 1]], [[1829]] &ndash; ''[[The Philadelphia Inquirer]]'' is founded as ''The Pennsylvania Inquirer''.
* [[October 1]], [[1829]] &ndash; [[South African College]] inaugurated in [[Cape Town]].
* [[1829]] &ndash; [[King's College London]] is founded under the patronage of [[George IV of the United Kingdom|King George IV]] and the [[prime minister]] [[Arthur Wellesley, 1st Duke of Wellington|The Duke of Wellington]]. It will become the third official [[university]] in [[England]].
* [[1829]] &ndash; The [[Chalmers University of Technology]] is founded in [[Gothenburg]].

== Disasters, natural events, and notable mishaps ==
* [[November 20]], 1820 After the sinking of the [[Essex (1799 whaleship)]] of [[Nantucket]] by a [[whale]] the survivors were left floating in three small whaleboats. They eventually resorted, by common consent, to [[Human cannibalism|cannibalism]] to allow some to survive.
* 1820: [[Mount Rainier]] erupts over what is today Seattle.
* [[February 6]], [[1822]] &ndash; [[China|Chinese]] [[Junk (ship)|junk]] ''[[Tek Sing]]'' sinks in the [[South China Sea]] with the loss of around 1600 people on board.
* [[May 26]], [[1822]] &ndash; 116 people die in the [[Grue Church fire]], the biggest fire disaster in Norway's history.
* [[1822]] &ndash; An [[earthquake]] in [[Chile]] raises the coastal area.
* [[July 15]], 1823 &ndash; The [[Basilica of Saint Paul Outside the Walls]] in [[Rome]] is almost completely destroyed by fire.
* [[November 7]], 1824 &ndash; In the worst flood to date in [[Saint Petersburg]], water rises 421&nbsp;cm above normal and 200 lose their lives.
* [[October 7]], [[1825]] &ndash; The [[Miramichi Fire]] breaks out in New Brunswick.
* August, [[1826]] &ndash; The town of [[Crawford Notch]] [[Willey House (New Hampshire)#1826 disaster|suffers a landslide]], killing nine people.  Those killed include seven members of the Willey family, after whom [[Mount Willey]] is named.
* [[1828]] &ndash; A [[typhoon]] kills approximately 10,000 people in [[Kyūshū]], Japan.

== Religion ==
* 1820: [[Joseph Smith]] receives his [[First Vision]] in the spring in [[Palmyra (town), New York|Palmyra, New York]].
* [[September 22]], 1823 &ndash; [[Joseph Smith]] says that he was directed by God through the angel Moroni to the place where the [[Golden plates]] are stored.
* [[February 11]], [[1826]] &ndash; [[Swaminarayan]] writes the [[Shikshapatri]], an important text within the [[Swaminarayan faith]].
* [[July 26]], [[1826]] &ndash; The last ''[[auto-da-fé]]'' is held in [[Valencia, Spain]].
* [[March 31]], [[1829]] &ndash; [[Pope Pius VIII]] succeeds [[Pope Leo XII]] as the 253rd [[pope]].
* [[June 19]], [[1829]] &ndash; [[Robert Peel]]'s [[Metropolitan Police Act 1829|Metropolitan Police Act]] establishes the [[Metropolitan Police Service]] in London, the first modern police force. The first officers, known by the nicknames "bobbies" or "peelers", go on patrol on [[September 29]].<ref name="Pocket On This Day"/>

== People ==
=== Authors ===
* [[Nathaniel Hawthorne]]
* [[Mary Shelley]]
* [[Alexandre Dumas]]
* [[Washington Irving]]
* [[Walter Scott]].
* [[John Neal]]
* [[Lord Byron]]
* [[Percy Shelly]]

=== Composers ===
* [[Ludwig van Beethoven]]
* [[Nicolo Paganini]]
* [[Carl Maria von Weber]]
* [[Gioachino Rossini]]
* [[Franz Schubert]]
* [[Felix Mendelssohn]]
* [[Frederic Chopin]]
* [[Franz Liszt]]
{{Births and deaths by year for decade|182}}

== References ==
{{Reflist|30em}}
* {{Cite book |last=Orr |first=Tamra |url=https://books.google.com/books?id=BBtwSo-oWq0C&dq=Sultan+Muhammad+Alam&pg=PA35 |title=Brunei |date=2008 |publisher=Marshall Cavendish |isbn=978-0-7614-3121-3 |language=en}}

{{19th century}}
{{Authority control}}

[[Category:1820s| ]]