* 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.

* 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 ).

Buenos Aires was invaded in 1806, and then liberated by forces from Montevideo led by Santiago de Liniers.

Buenos Aires was captured in 1806, and then liberated by Santiago de Liniers with forces from Montevideo.

The British forces were thrown back by the criollos on December 1806, a militia force from Montevideo under the leadership of Santiago de Liniers.

In 1806, a small British army led by William Carr Beresford seized Buenos Aires for a brief time ; a Montevidean army led by Santiago de Liniers liberated the city.

After the British invasion of 1806, Santiago de Liniers successfully reconquered Buenos Aires.

The French Santiago de Liniers moved to Montevideo and led the forces that would reconquer Buenos Aires on August 12, 1806.

* 1508: Baron de Ros, called out of abeyance after 4 years ; again in 1806 ( after 119 years ), in 1943 ( after 4 years ) and in 1958 ( after 2 years ).

* 1879 – Manuel de Araújo Porto-alegre, Brazilian Romantic poet, painter and caricaturist ( b. 1806 )

The defeat of the British invasions of the Río de la Plata in South America ( 1806 and 1807 ) emboldened an independent attitude in Spain's American colonies.

Portrait by Friedrich Engels. Johann Kaspar Schmidt ( October 25, 1806 – June 26, 1856 ), better known as Max Stirner ( the nom de plume he adopted from a schoolyard nickname he had acquired as a child because of his high brow, in German ' Stirn '), was a German philosopher, who ranks as one of the literary fathers of nihilism, existentialism, post-modernism and anarchism, especially of individualist anarchism.

* 1806 – British forces take Buenos Aires during the first British invasions of the Río de la Plata.

In 1806 the Governor General, Charles Mathieu Isidore Decaen, created the city of Mahébourg, named in honour of Mahé de La Bourdonnais.

After the Louisiana Purchase by the United States in 1803, this indefinite nature of the boundary between the U. S. and Spain led to an agreement on November 6, 1806, negotiated by Gen. James Wilkinson and Lt. Col. Simón de Herrera, to establish a neutral territory on both sides of the river.

* 1806 – Christophe Léon Louis Juchault de Lamoricière, French general ( d. 1865 )

In 1806 and 1807, the British ( enemies of Spain in the Napoleonic Wars ) launched the British invasions of the Río de la Plata.

* January 31 – Adolphe Granier de Cassagnac, French politician ( b. 1806 )

de: 1806

* June 14 – Charles-Augustin de Coulomb, French physicist ( d. 1806 )

Towards the late 18th century, Mathurin Jacques Brisson ( 1723 – 1806 ) and Comte de Buffon ( 1707 – 1788 ) began new works on birds.

Napoleon I on his Imperial Throne, 1806, oil on canvas, 260 x 163 cm, Musée de l ' Armée, Paris

It appears that Shelley found inspiration for the title of her novel in Jean-Baptiste Cousin de Grainville's Le Dernier Homme ( 1805 ), translated into English in 1806 as Omegarus and Syderia.

Between 1806 and 1807, British military forces tried to invade the area of the Rio de la Plata, at the command of Home Riggs Popham and William Carr Beresford, and John Whitelocke.

* 1806 – François Isaac de Rivaz invented a hydrogen powered engine, the first successful internal combustion engine.

Louis Napoléon Bonaparte, Prince Français, Comte de Saint-Leu ( 2 September 1778 – 25 July 1846 ), King of Holland ( 1806 – 10 ), was the fifth surviving child and the fourth surviving son of Carlo Buonaparte and Letizia Ramolino.

Prince Eugène was adopted by Napoleon on 12 January 1806 ; while excluded from the French empire's succession, he was given presumptive rights for him and his descendants in the male line to the throne of Italy in the absence of a second son of Napoleon on 16 February 1806, and hence on 20 December 1807 given the title of Prince de Venise (' Prince of Venice '), which had been instituted by article 9 of the decree of 30 March 1806 ( when the former Austrian province of Venice was united to Bonaparte's kingdom of Italy ) for the Heir Presumptive to Napoleon in Italy.

* Sultanate of Zanzibar two incumbents ( from the Omani dynasty ) since the de facto separation from Oman in 1806, the last assumed the title Sultan in 1861 at the formal separation under British auspices ; since 1964 union with Tanganyika part of Tanzania )

Ultimately, the actual experience of successfully defending without Spanish aid the viceroyalty from a foreign invader during the 1806 – 1807 British invasions of the Río de la Plata, triggered a decisive quest for even greater autonomy from the colonial metropolis.

On 4 August 1806, Liniers landed at Las Conchas, north of Buenos Aires, and advanced with a mixed force of Buenos Aires line troops and Montevideo Militia toward the city.

The last was that of Henry Dundas, 1st Viscount Melville in 1806.

The most recent cases of impeachment dealt with Warren Hastings, Governor-General of India between 1773 and 1786 ( impeached in 1788 ; the Lords found him not guilty in 1795 ), and Henry Dundas, 1st Viscount Melville, First Lord of the Admiralty, in 1806 ( acquitted ).

In 1806, he was appointed commander-in-chief of India ( to succeed Charles Cornwallis, 1st Marquess Cornwallis, who had died shortly after arriving in India.

As a reward for his services at Austerlitz ( 2 December 1805 ) he became the 1st Sovereign Prince of Ponte Corvo ( 5 June 1806 ), but during the campaign against Prussia, in the same year, was severely reproached by Napoleon for not participating with his army corps in the battles of Jena and Auerstädt, though close at hand.

* Sir John Anderson, 1st Baronet, of Mill Hill ( c. 1736 – 1813 ), British politician, MP for City of London, 1793 – 1806

Captain Abraham Bristow named them " Lord Auckland's " on 18 August 1806 in honour of his father's friend William Eden, 1st Baron Auckland.

This was the first military funeral by river since that of Horatio Nelson, 1st Viscount Nelson in 1806.

* Henry Addington, 1st Viscount Sidmouth ( 8 October 1806 – 26 March 1807 )

In 1806 the Foreign Secretary, Charles James Fox, appointed him secretary to a diplomatic mission to Portugal, led by James St Clair-Erskine, 2nd Earl of Rosslyn and John Jervis, 1st Earl of St Vincent.

Somers Town was named for Charles Cocks, 1st Baron Somers ( 1725 – 1806 ).

It was created in 1806 for General Charles Grey, 1st Baron Grey.

George Macartney, 1st Earl Macartney, KB ( 14 May 1737 – 31 May 1806 ) was an Irish-born British statesman, colonial administrator and diplomat.

Marshal of France and Grand Admiral or Admiral of France Joachim-Napoléon Murat ( ( born Joachim Murat ; ; 25 March 1767 – 13 October 1815 ) 1st Prince Murat, was Grand Duke of Berg from 1806 to 1808 and then King of Naples from 1808 to 1815.

Promoted Major of the 40th regiment of the line on 30 Brumaire Year XII, and on the 4th of Germinal, a member of the Legion of Honor, his services at the battle of Austerlitz earned him, on 6 Nivose year XIV, the rank of colonel and his admission, as a Major in the 1st regiment of grenadiers of the Old Guard, on 1 May 1806.

Catherine Isabella ( 1778 – 1810 ), daughter of William Eden, 1st Baron Auckland, in July 1806.

Edward Thurlow, 1st Baron Thurlow PC, KC ( 9 December 1731 – 12 September 1806 ) was a British lawyer and Tory politician.

* Charles Loftus, 1st Marquess of Ely ( 1738 – 1806 )

The 1st Marquess had been created Baron Ailsa in the Peerage of the United Kingdom on 12 November 1806.

A grandson of Henry Fox, 1st Baron Holland, and nephew of Charles James Fox, he served as Lord Privy Seal between 1806 and 1807 in the Ministry of All the Talents headed by Lord Grenville and as Chancellor of the Duchy of Lancaster between 1830 and 1834 and again between 1835 and his death in 1840 in the Whig administrations of Lord Grey and Lord Melbourne.

* George Macartney, 1st Earl Macartney ( 1737 – 1806 )

* Susannah Hood, 1st Baroness Hood ( d. 1806 )

Mourne Park House was extensively re-built in 1806 on the instructions of the 12th Viscount Kilmorey, later the 1st Earl.

It was created in 1806 for Charles Agar, 1st Viscount Somerton, Archbishop of Dublin.

It was created in 1821 for the lawyer and politician John Scott, 1st Baron Scott, Lord Chancellor from 1801 to 1806 and from 1807 to 1827.