1791

Millennium:	2nd millennium
Centuries:	17th century – 18th century – 19th century
Decades:	1760s 1770s 1780s – 1790s – 1800s 1810s 1820s
Years:	1788 1789 1790 – 1791 – 1792 1793 1794

1791 by topic:
Arts and Sciences
Archaeology – Architecture – Art – Literature (Poetry) – Music – Science
Countries
Australia – Canada – Canada –Denmark – France – Great Britain – Ireland – Norway – Portugal – Scotland –Sweden – United States
Lists of leaders
Colonial governors – State leaders
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments
Works category
Works

1791 in other calendars
Gregorian calendar	1791 MDCCXCI
Ab urbe condita	2544
Armenian calendar	1240 ԹՎ ՌՄԽ
Assyrian calendar	6541
Bengali calendar	1198
Berber calendar	2741
British Regnal year	31 Geo. 3 – 32 Geo. 3
Buddhist calendar	2335
Burmese calendar	1153
Byzantine calendar	7299–7300
Chinese calendar	庚戌年 (Metal Dog) 4487 or 4427 — to — 辛亥年 (Metal Pig) 4488 or 4428
Coptic calendar	1507–1508
Discordian calendar	2957
Ethiopian calendar	1783–1784
Hebrew calendar	5551–5552
Hindu calendars
- Vikram Samvat	1847–1848
- Shaka Samvat	1713–1714
- Kali Yuga	4892–4893
Holocene calendar	11791
Igbo calendar	791–792
Iranian calendar	1169–1170
Islamic calendar	1205–1206
Japanese calendar	Kansei 3 (寛政３年)
Julian calendar	Gregorian minus 11 days
Korean calendar	4124
Minguo calendar	121 before ROC 民前121年
Thai solar calendar	2333–2334

Wikimedia Commons has media related to 1791.

1791 (MDCCXCI) was a common year starting on Saturday (dominical letter B) of the Gregorian calendar and a common year starting on Wednesday (dominical letter E) of the Julian calendar, the 1791st year of the Common Era (CE) and Anno Domini (AD) designations, the 791st year of the 2nd millennium, the 91st year of the 18th century, and the 2nd year of the 1790s decade. Note that the Julian day for 1791 is 11 calendar days difference, which continued to be used from 1582 until the complete conversion of the Gregorian calendar was entirely done in 1929.

Events

January–June

January 12 – Holy Roman troops reenter Liège, heralding the end of the Liège Revolution and the restoration of its Prince-Bishops.
January 25 – The British Parliament passes the Constitutional Act 1791, splitting the old province of Quebec into Upper and Lower Canada.
February 21 – The United States opens diplomatic relations with Portugal.
March 2 – In France:
- Abolition of guilds is enacted.
- A mechanical semaphore line for rapid long-distance communication is demonstrated by Claude Chappe in Paris.
March 4 – Vermont is admitted as the 14th U.S. state.
March 13 – Thomas Paine's chief work Rights of Man (first part) is published in London.^[1]
March – In France, the National Constituent Assembly accepts the recommendation of its Commission of Weights and Measures that the nation should adopt the metric system.
April 21 – The first of forty boundary stones delineating the borders of the new District of Columbia in the United States is laid at Jones Point Light, in Alexandria, Virginia.
May 3 – The Sejm of the Polish–Lithuanian Commonwealth proclaims the Constitution of May 3, 1791, the first modern codified constitution in Europe.
June 20 – Flight to Varennes: The French Royal Family is captured when they try to flee in disguise.
June 21 – Foundation date of the Ordnance Survey in Great Britain.^[2]

July–December

July 8 – Composer Joseph Haydn is awarded an honorary doctorate of music at the University of Oxford.
July 14 – The Priestley Riots against Dissenters break out in Birmingham, England.
July 17 – The Champ de Mars Massacre occurs during the French Revolution.
August 4 – The Treaty of Sistova is signed, ending the Ottoman–Habsburg wars.
August 6 – The Brandenburg Gate in Berlin is finished.
August 21 – Haitian Revolution: A slave rebellion breaks out in the French colony of Saint-Domingue.
August 26 – John Fitch is granted a patent for the steamboat in the United States.
August 27 – Battle of Tellicherry (Third Anglo-Mysore War) off the south-west coast of India: a British Royal Navy patrol forces a French convoy bound for Mysore to surrender.
September 6 – Wolfgang Amadeus Mozart's opera seria La clemenza di Tito premières at the Estates Theatre in Prague to mark the coronation of Leopold II as King of Bohemia.
September 13 – Louis XVI of France accepts the final version of the completed constitution.
September 25 – Mission Santa Cruz is founded by Father Fermín Lasuén, becoming the 12th mission in the California mission chain.
September 28 – Promulgation of the law on Jewish emancipation in France, the first such legislation in Europe.
September 30 – Wolfgang Amadeus Mozart's singspiel opera The Magic Flute (Die Zauberflöte) premières at the Freihaus-Theater auf der Wieden in Vienna.
October – The Legislative Assembly (France) convenes.
October 9 – Mission Nuestra Señora de la Soledad is founded by Father Fermín Lasuén, becoming the 13th mission in the California mission chain.
October 28 – Publication of the Declaration of the Rights of Woman and the Female Citizen in France.
December 4 – The first issue of The Observer, the world's first Sunday newspaper, is published in London.
December 5 – Austrian composer Wolfgang Amadeus Mozart dies aged 35 at his home in Vienna, perhaps of acute rheumatic fever, and is buried two days later.
December 15 – Ratification by the states of the first ten amendments to the United States Constitution is completed, creating the United States Bill of Rights. Two additional amendments remain pending, and one of these is finally ratified in 1992, becoming the Twenty-seventh Amendment.

Date unknown

The first American ship reaches Japan.
An ordinance is written barring the game of baseball within 80 yards of the Meeting House in Pittsfield, Massachusetts (first known reference to the game of baseball in North America).
The School for the Indigent Blind, the oldest continuously operating specialist school of its kind in the world, is founded in Liverpool, England, by blind ex-merchant seaman, writer and abolitionist Edward Rushton.
The Casbah of Algiers Palace is completed.^[3]