* 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 )

In 1791, the commissioners named the permanent seat of government " The City of Washington in the Territory of Columbia " to honor Washington.

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.

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.

More energetic planning with surveys took place repeatedly in 1776 ( by George Washington ), 1791, 1803, 1818, 1824 – 1830, and 1860.

In 1791, the Town of Cambridge was transferred from Albany County to Washington County.

Washington County was slightly enlarged by the transfer of the Town of Cambridge from Albany County to Washington County in 1791.

Albany County was reduced in size in 1786 by the splitting off of Columbia County ; again in 1791 by the splitting off of Rensselaer and Saratoga Counties and the transfer of the Town of Cambridge to Washington County.

On February 25, 1791, Washington signed the " bank bill " into law.

Named in honor of George Washington, the City of Washington was founded in 1791 to serve as the new national capital.

On September 9, 1791, the three commissioners overseeing the capital's construction named the city in honor of President Washington.

In 1791, President Washington commissioned Pierre ( Peter ) Charles L ’ Enfant, a French-born architect and city planner, to design the new capital.

He divested himself of all land holdings in Washington County in 1791.

Tuckerton became a Port of Entry of the United States, but not the third port as is commonly believed, with Ebenezer Tucker appointed Collector ; his commission bearing date March 21, 1791 signed by George Washington and Thomas Jefferson.

President George Washington is known to have slept in Tarboro during a visit on his 1791 Southern tour, and is noted to have said of the town that it was " as good a salute as could be given with one piece of artillery .”

This tax had been proposed by United States Secretary of the Treasury Alexander Hamilton, passed by Congress, and signed into law by President Washington in 1791.

Briarcliffe was one of the first planned communities in the southeast, which is interesting on its own terms, but its story is a window into the whole of the area ( not even mentioning the Vereens, in whose home George Washington slept April 1791, and much more besides ).

The Whiskey Rebellion, or Whiskey Insurrection, was a tax protest in the United States beginning in 1791, during the presidency of George Washington.

George Washington defined the revenue districts, appointed the revenue supervisors and inspectors, and set their pay in November 1791.

On September 11, 1791, a recently appointed tax collector named Robert Johnson was tarred and feathered by a disguised gang in Washington County.

The American Maritime Fur Trader Joseph Ingraham first visited the northern Marquesas while commanding the brig Hope in 1791, giving them the name Washington Islands.