* Herbert Austin ( 1866 – 1941 ), British founder of the Austin Motor Company

* 1866 – Felix-Raymond-Marie Rouleau, Canadian cardinal of the Roman Catholic Church ( d. 1931 )

* 1866 – Princess Viktoria of Prussia ( d. 1929 )

* 1866 – Allen Lard, American golfer ( death date unknown )

* 1866 – Giovanni Agnelli, Italian businessman, founded Fiat S. p. A ( d. 1945 )

* 1866 – Gábor Klauzál, Hungarian politician ( b. 1804 )

* 1866 – Matthew Henson, American explorer ( d. 1955 )

* 1866 – José de Diego, Puerto Rican statesman and journalist ( d. 1918 )

* 1866 – Charles Jean de la Vallée-Poussin, Belgian mathematician ( d. 1962 )

* 1866 – Italo Santelli, Italian fencer ( d. 1945 )

* 1866 – Jacinto Benavente, Spanish writer, Nobel Prize laureate ( d. 1954 )

* 1866 – Henrik Sillem, Dutch sports shooter ( d. 1907 )

* Alexander John Cuza, prince of Romania ( 1859 – 1866 )

* 1866 – Austro-Prussian War ends with the Treaty of Prague.

* 1866 – Anne Sullivan, American teacher, instructor and companion of Helen Keller ( d. 1936 )

* 1866 – Ernest Starling, British physiologist ( d. 1927 )

* 1866 – Italy and Prussia ally against the Austrian Empire.

* 1866 – The American Society for the Prevention of Cruelty to Animals ( ASPCA ) is founded in New York City by Henry Bergh.

He married fourthly at the Dolmabahçe Palace, Constantinople, on 21 September 1866 to Georgian HH Hayranidil Kadın Efendi ( Kars, 2 November 1846 – Ortaköy Palace, Constantinople, 26 November 1898 ), and had two children.

The Earl of Derby, Prime Minister 1852, 1858 – 59, 1866 – 68

Charles Erdman ( 1866 – 1960 ) advocated apostolic authorship and wrote that only the Apostle John fits the image of the author derived from the text.

#** Marie Laetitia Eugénie Catherine Adélaïde Bonaparte ( 1866 – 1926 )

Le déjeuner sur l ' herbe, ( right section ), with Gustave Courbet, 1865 – 1866, Musée d ' Orsay, Paris, France | Paris

The 17-volume Grand dictionnaire universel du XIXe siècle and its supplements were published in France by Pierre Larousse from 1866 to 1890.

Mecklenburg, divided between Grand Duchy of Mecklenburg-Schwerin | Mecklenburg-Schwerin and Grand Duchy of Mecklenburg-Strelitz | Mecklenburg-Strelitz, from 1866 to 1934.

Among its accomplishments, the United Province of Canada negotiated the Reciprocity Treaty of 1854 with the United States, built the Grand Trunk Railway, improved the educational system in Canada West under Egerton Ryerson, reinstated French as an official language of the legislature and the courts, codified the Civil Code of Lower Canada in 1866, and abolished the seigneurial system in Canada East.

Historian and Forrest biographer Brian Steel Wills writes, “ While there is no doubt that Forrest joined the Klan, there is some question as to whether he actually was the Grand Wizard of the Ku Klux Klan .” The KKK ( the Klan ) was formed by veterans of the Confederate Army in Pulaski, Tennessee in 1866 and soon expanded throughout the state and beyond.

The Victorian era saw the building of many major attractions including the Grand Hotel ( 1864 ), the West Pier ( 1866 ) and the Palace Pier ( 1899 ).

* He was the 973rd Knight of the Order of the Golden Fleece in Austria, the 748th Knight of the Order of the Garter in 1866 and the 69th and 321st Grand Cross of the Order of the Tower and Sword.

File: Midland Grand Hotel, St Pancras Station-geograph. org. uk-1266. jpg | Former Midland Grand Hotel, St. Pancras Station ( 1866 – 76 )

File: Midland Grand Hotel St Pancras spires turrets. jpg | Roof scape, Former Midland Grand Hotel, St. Pancras Station ( 1866 – 76 )

File: St Pancras Railway Station. jpg | Former Midland Grand Hotel, St. Pancras Station ( 1866 – 76 )

File: St pancras clock tower. jpg | Clock Tower, Former Midland Grand Hotel, St. Pancras Station ( 1866 – 76 )

In 1866 the chief engineer for the Grand River Valley Railroad began a survey for a route from Jackson to Grand Rapids.

The end of the Civil War brought additional settlers and in November 1866 a group of men petitioned the Board of Supervisors of Grand Traverse County to form " Viola " township.

The Grand Trunk Railroad opened a station in 1866.

The community was founded in 1866 when the Grand Trunk Railroad built a line and opened a station.

According to Samuel L. French, author of Reminiscences of Plymouth, Luzerne County, Penna., "... the present Borough of Plymouth was erected by decree of Honorable John N. Conyngham, President Judge of the Court of Common Pleas of Luzerne County, on the 23rd day of April, A. D., 1866, upon the recommendation of the Grand Jury ..."

In 1866, the Grand Tunnel Coal Co. operated the mine, and in 1871, the New England Coal Co. operated the mine.

Although the Duchy of Nassau was annexed by Prussia in 1866, Duke Adolf maintained and renewed the Order when he became Grand Duke of Luxembourg.

Emerging as most influential among the various organizations was the Grand Army of the Republic, founded on April 6, 1866, on the principles of " Fraternity, Charity and Loyalty ," in Decatur, Illinois, by Benjamin F. Stephenson.

# Grand Rabbi Yitzchak Meir Alter ( 1798 – March 10, 1866 ), also known as the Chiddushei HaRim.

# Grand Rabbi Avraham Mordechai Alter ( December 25, 1866 – June 3, 1948 ), also known as the Imrei Emes.