* 1723 – Mathurin Jacques Brisson, French naturalist ( d. 1806 )

* 1806 – Francis II, the last Holy Roman Emperor, abdicates ending the Holy Roman Empire.

* 1806 – Battle of Mišar during the Serbian Revolution begins.

* 1806 – Santiago de Liniers, 1st Count of Buenos Aires re-takes the city of Buenos Aires, Argentina after the first British invasion.

* 1724 – George Stubbs, English painter ( d. 1806 )

* Anton Alexander Graf von Auersperg ( 1806 – 1876 ) – Austrian poet who wrote under the pseudonym of Anastasius Grün.

The Lewis and Clark Expedition spent the winter of 1805 – 1806 at Fort Clatsop, a small log structure south and west of modern day Astoria.

* 1806 – Michael Haydn, Austrian composer ( b. 1737 )

* 1727 – Michel Adanson, French botanist ( d. 1806 )

* William Bernard Ullathorne ( 1806 – 89 )

Following his conquest of most of Western Europe, the first Napoleon made his elder brother Joseph ( 1768 – 1844 ) king first of Naples ( 1806 – 1808 ) and then of Spain ( 1808 – 1813 ), his third brother Louis ( 1778 – 1846 ) king of Holland ( 1806 – 1810 ) ( subsequently forcing his abdication after his failure to subordinate Dutch interests to those of France ) and his youngest brother Jérôme Bonaparte ( 1784 – 1860 ) king of Westphalia, the short-lived realm created from some of the states of northwestern Germany ( 1807 – 1813 ).

In 1806 his ambition was realized and he became professor of physics at the Copenhagen University, though not realizing full professorship ( ordinarius ) until 1817.

Jean-Robert Argand introduced the term " module " ' unit of measure ' in French in 1806 specifically for the complex absolute value and it was borrowed into English in 1866 as the Latin equivalent " modulus ".

In 1806, the French chemists Louis-Nicolas Vauquelin and Pierre Jean Robiquet isolated a compound in asparagus that was subsequently named asparagine, the first amino acid to be discovered.

The monument was designed by Jean Chalgrin in 1806, and its iconographic program pitted heroically nude French youths against bearded Germanic warriors in chain mail.

It was commissioned in 1806 after the victory at Austerlitz by Emperor Napoleon at the peak of his fortunes.

After 1806, the First Lord of the Admiralty was always a civilian, while the professional head of the navy came to be ( and is still today ) known as the First Sea Lord.

The earliest known recipe was by Maria Rundell in 1806.

The period between 1796 and 1806 was marked by intense conflicts over the nature of the new government or governments.

At the Battle of Jena-Auerstedt on October 14, 1806 – when Napoleon invaded Prussia and defeated the massed Prussian-Saxon army commanded by Karl Wilhelm Ferdinand, Duke of Brunswick – he was captured, one of the 25, 000 prisoners captured that day as the Prussian army disintegrated.

A definition of cocktail appeared in the May 13, 1806, edition of The Balance and Columbian Repository, a publication in Hudson, New York, in which an answer was provided to the question, " What is a cocktail ?".

However, a decision was made at the 1806 company meeting to send Thompson back out into the interior.

Designed by Daniel Asher Alexander and constructed originally between 1806 and 1809 by local labour, to hold prisoners of the Napoleonic Wars, it was also used to hold American prisoners from the War of 1812.

The town was home to the civil engineer and calculating prodigy George Parker Bidder ( 1806 – 1878 ), who is notable for his work on railways over much of the world, as well as the docks of the East End in the Port of London.

A major contributor was Elihu Palmer ( 1764 – 1806 ), who wrote the " Bible " of American deism in his Principles of Nature ( 1801 ) and attempted to organize deism by forming the " Deistical Society of New York ".

The city became part of the First French Empire in 1806 as Principality of Erfurt, and was returned to Prussia in 1815 after the Napoleonic Wars.

In 1806 he was granted another £ 20, 000 for his continuing work in microbiology.

In 1806, Jenner was elected a foreign member of the Royal Swedish Academy of Sciences.

He wished to maintain his and his family's Imperial status in the event that the Holy Roman Empire should be dissolved, as it indeed was in 1806 when an Austrian-led army suffered a humiliating defeat at the Battle of Austerlitz.

Succeeding rulers in Vietnam then continued to use this Emperor title until 1806 when this title was stopped being used for a century.

Edwin Abbott Abbott was the eldest son of Edwin Abbott ( 1808 – 1882 ), headmaster of the Philological School, Marylebone, and his wife, Jane Abbott ( 1806 – 1882 ).

Francis II () ( 12 February 1768 – 2 March 1835 ) was the last Holy Roman Emperor, ruling from 1792 until 6 August 1806, when he dissolved the Holy Roman Empire after the disastrous defeat of the Third Coalition by Napoleon at the Battle of Austerlitz.

For the two years between 1804 and 1806, Francis used the title and style by the grace of God elected Roman Emperor, always August, hereditary Emperor of Austria and he was called the Emperor of both Germany and Austria.

More successful was the Greater Poland Uprising of 1806, which led to the region's becoming part of the Napoleonic Duchy of Warsaw ( forming the Poznań Department and parts of the Kalisz and Bydgoszcz Departments ).

In 1806, a Fourth Coalition was set up.

The old Holy Roman Empire was little more than a farce ; Napoleon simply abolished it in 1806 while forming new countries under his control.

From 1806 to 1809, Fort Jay, by then renamed Fort Columbus was reconstructed in more substantial brick and granite with the addition of a ravelin ( giving the fort its current five pointed star appearance ) to better protect the fort's north face facing Manhattan and to better direct cannon fire on to the East and Hudson Rivers.

Accordingly, in July 1806, Nott and the trustees determined to acquire a large tract of land to the east of the Downtown Schenectady, on a gentle slope up from the Mohawk River and facing nearly due west.

With its return in 1806, it had fulfilled Jefferson's hopes by amassing much new data about the topographical features of the country and its natural resources, with details on the flora and fauna, as well as the many Indian tribes of the West with which he hoped to increase trading.

Chaussard ( Le Pausanias Français, 1806 ) condemned Ingres's style as gothic and asked: How, with so much talent, a line so flawless, an attention to detail so thorough, has M. Ingres succeeded in painting a bad picture?

After selling much of his farm to the Ellicotts and others, he died in his log cabin nine years later on October 9, 1806, exactly one month before his 75th birthday.

By 1806 much of the land surrounding the settlement had been cleared and replaced by orchards and farms.

In 1806 Shah Alam ’ s son Akbar Shah II acceded to the much diminished empire of the Mughals and ruled until 1837. He gave the title " raja " to Ram mohan roy.

In the Netherlands the question whether or not public schools should be Christian and in what way was subject of much debate between 1806 and 1917.

Information about the time from 1677 to 1793 is promised by the contents of the archives of the ( beginning in 1806 ) Princes of the Leyen, which in 1995 ended up in the Rhineland-Palatinate Main State Archive in Koblenz, but hitherto not much of this information has been forthcoming.

John Cator ( 1728 – 26 February 1806 ) was a wealthy timber merchant and landowner responsible for the layout of much of the areas around Blackheath and Beckenham, both in London — and both of which were in the county of Kent during the late 18th century.

Montgelas was the inspirer and director of the policy by which the Electorate of Bavaria was turned into a kingdom in 1806, and was very much increased in size by the annexation of church lands, free towns and small lordships.

Willaumez was able to avoid attack by British forces during the spring of 1806, and cruised in the Caribbean during much of the summer, but his force was eventually dispersed by a hurricane in August and the survivors forced to shelter on the American Eastern Seaboard.

Thus began the period ( briefly interrupted from 1804 to 1806 ) of British control of the Cape, and subsequently much of Southern Africa.