* 1791 – Beginning of the Haitian Slave Revolution in Saint-Domingue.

* Haliotis australis Gmelin, 1791 – the Austral abalone

* Haliotis gigantea Gmelin, 1791 – the giant abalone, Awabi

* Haliotis glabra Gmelin, 1791 – the glistening abalone

* Haliotis iris Gmelin, 1791 – the blackfoot abalone, rainbow abalone, or Pāua

* Haliotis ovina Gmelin, 1791 – the sheep's ear abalone

* Haliotis pulcherrima Gmelin, 1791 – the most beautiful abalone

* 1791 – American troops destroy the Miami town of Kenapacomaqua near the site of present-day Logansport, Indiana in the Northwest Indian War.

* 1719 – Charles-François de Broglie, marquis de Ruffec, French soldier and diplomat ( d. 1791 )

* 1791 – sinks after having run aground on a reef the previous day.

* 1718 – Frederick Haldimand, Swiss-English military officer ( d. 1791 )

They were considered a Catholic innovation, not widely practiced until the 18th century, and were opposed vigorously in worship by a number of Protestant Reformers, including Martin Luther ( 1483 – 1546 ), John Calvin ( 1509 – 1564 ) and John Wesley ( 1703 – 1791 ).

* 1791 – The Treaty of Sistova is signed, ending the Ottoman – Habsburg wars.

* Christian Charles Josias Bunsen ( 1791 – 1860 ), Prussian diplomat and scholar

* Frances Bunsen ( 1791 – 1876 ), or Baroness Bunsen, Welsh painter and author, wife of Christian Charles Josias Bunsen

For example, Panama and El Salvador have declared U. S. currency to be legal tender, and from 1791 – 1857, Spanish silver coins were legal tender in the United States.

Charles Babbage, FRS ( 26 December 1791 – 18 October 1871 ) was an English mathematician, philosopher, inventor and mechanical engineer who originated the concept of a programmable computer.

The current resistance to Russian rule has its roots in the late 18th century ( 1785 – 1791 ), a period when Russia expanded into territories formerly under the dominion of Turkey and Persia ( see also the Russo-Turkish Wars and Russo-Persian War ( 1804 – 1813 )), under Mansur Ushurma — a Chechen Naqshbandi ( Sufi ) Sheikh — with wavering support from other North Caucasian tribes.

* 1791 – The United States Bill of Rights becomes law when ratified by the Virginia General Assembly.

* 1847 – Archduchess Marie Louise of Austria, second wife of Napoleon ( b. 1791 )

* 1716 – Etienne-Maurice Falconet, French sculptor ( d. 1791 )

Under the Constitution of 1791, France would function as a constitutional monarchy.

In 1791 the Great Sejm | Great or Four-Year Sejm adopted the Constitution of May 3, 1791 | May 3 Constitution at Warsaw's Royal Castle, Warsaw | Royal Castle

Under the Constitution of 1791, France would function as a constitutional monarchy with Louis XVI as little more than a figurehead.

Under the Constitution of 1791, the solution of a constitutional monarchy was adopted, and the king supported a war against Austria in order to increase his popularity, starting the long French Revolutionary Wars.

* 1789 – James Madison introduces twelve proposed amendments to the United States Constitution in the House of Representatives ; by 1791, ten of them are ratified by the state legislatures and become the Bill of Rights ; another is eventually ratified in 1992 to become the 27th Amendment.

On October 25, 1791 Washington appealed a third time to Congress, " A uniformity of the weights and measures of the country is among the important objects submitted to you by the Constitution and if it can be derived from a standard at once invariable and universal, must be no less honorable to the public council than conducive to the public convenience.

In 1791, the " Great Sejm " or Four-Year Sejm | Four-Year Sejm of 1788-1792 and Senate adopt the May 3rd Constitution at the Royal Castle, Warsaw | Royal Castle in Warsaw

The liberum veto was finally abolished with the adoption of Poland's 3rd May Constitution in 1791, a piece of legislation which was passed as ' The Government Act ', and for which the Sejm required four years to propagate and adopt.

He co-authored the Polish-Lithuanian Commonwealth's Constitution of May 3, 1791, and founded the Assembly of Friends of the Government Constitution to assist in the document's implementation.

* Stanisław August Poniatowski ( 1732 – 98 ), the last king of independent Poland, a leading light of the Enlightenment in the Polish-Lithuanian Commonwealth, and co-author of one of the world's first modern constitutions, the Constitution of May 3, 1791.

The Ninth Amendment became part of the Constitution on December 15, 1791 upon ratification by three-fourths of the states.

The Tenth Amendment ( Amendment X ) to the United States Constitution, which is part of the Bill of Rights, was ratified on December 15, 1791.

Central documents include the Declaration of Independence ( 1776 ), the Constitution ( 1787 ), the Federalist Papers ( 1788 ), the Bill of Rights ( 1791 ), and Lincoln's " Gettysburg Address " ( 1863 ), among others.

* May 3 – The Sejm of the Polish – Lithuanian Commonwealth proclaims the Constitution of May 3, 1791, the first modern codified constitution in Europe.

It was adopted in 1793 following Vermont's admission to the Union in 1791 and is largely based upon the 1777 Constitution of Vermont which was ratified at Windsor in the Old Constitution House.

Prior to 1791 Vermont was an independent state, known as the Vermont Republic, governed under the Constitution of the Vermont Republic.

The May Constitution of 1791 enfranchised the bourgeoisie, established the separation of the three branches of government, and eliminated the abuses of the Repnin Sejm.

Constantly monitored by revolutionary spies within her own household, the queen played little or no part in the writing of the French Constitution of 1791, which greatly weakened the king's authority.

After the Patriote Rebellion was crushed by the British army and Loyal volunteers, the 1791 Constitution was suspended on 27 March 1838 and a special council was appointed to administer the colony.

Francis Hopkinson ( September 21, 1737 – May 9, 1791 ), an American author, was one of the signers of the Declaration of Independence as a delegate from New Jersey.

In May 1791, the Assembly declared that the Louvre would be " a place for bringing together monuments of all the sciences and arts ".

President Washington visited Charleston, South Carolina in May 1791 on his " Southern Tour ", and saw the under-construction Charleston County Courthouse designed by Irish architect James Hoban.

* May 2 – Giacomo Meyerbeer, German composer ( b. 1791 )

The impressions from the journey were described in a three volume publication Ansichten vom Niederrhein, von Brabant, Flandern, Holland, England und Frankreich im April, Mai und Juni 1790 ( Views of the Lower Rhine, from Brabant, Flanders, Holland, England, and France in April, May and June 1790 ), published 1791 – 1794.

Generalsuperintendant von Schleswig und Holstein " (" Royal general superintendent of Schleswig and Holstein ") between 1760 and 1791, and his wife ( m. Berleburg, 8 May 1732 ) Maria Dorothea Carl ( Berleburg, 31 July 1716 – Schleswig, 31 December 1792 ), a respectable middle-class family that believed in religious tolerance.

* 10 May 1774 – 1 October 1791: Her Majesty The Queen of France and Navarre

The May Constitution of 1791 gave the Tatars representation in the Polish Sejm.

After the Sejm passed the Constitution of May 3, 1791, local Sejmiks were obliged to legitimize it.

On May 6, 1837, Juan M. Sanchez ( 1791 – 1873 ), a former Santa Barbara Presidio soldier, was granted the Rancho Santa Clara del Norte, which contained of land extending from the Santa Clara River south to the northern boundary of present day Camarillo, and from the present day 101 Freeway east to the west end of South Mountain.

The largest earthquake recorded for Connecticut was an intensity VII quake on May 16, 1791 near Moodus.

The region was first settled around 1791 by Abraham Hendricks, and it was organized as the " Town of Frederickstown " on 18 May 1796, when the County of Steuben was formed from a part of the larger Ontario county.

The surrounding powers considered the Commonwealth's internal situation and the reforms initiated by the Constitution of May 3, 1791, the first constitution written in the modern era in Europe and second in the world after that of the United States, as a threat to their influence over Polish politics.