François Alexandre Frédéric, duc de la Rochefoucauld-Liancourt
François Alexandre Frédéric de La Rochefoucauld, Duke of La Rochefoucauld (11 January 1747 – 27 March 1827) was a French social reformer.
Known as the duc de Liancourt in infancy, he became an officer of carbineers, and married at seventeen. A visit to England seems to have suggested the establishment of a model farm at Liancourt, where he reared cattle imported from England and Switzerland. He also set up spinning machines on his estate, and founded a school, École nationale supérieure d'arts et métiers, for the sons of soldiers, which became in 1788 the École des Enfants de la Patrie under royal protection. In 2008, this school was renamed Arts et Métiers ParisTech.
He was elected to the Estates-General of 1789, and sought in vain to support the cause of royalty, while furthering the social reforms he sought.
On 12 July, two days before the storming of the Bastille, he warned Louis XVI of the state of affairs in Paris, and met his exclamation that there was a revolt with the answer, "Non, sire, c'est une révolution." ("No, majesty, it is a revolution.") 
On 18 July, he became president of the National Constituent Assembly. Established in command of a military division in Normandy, he offered Louis a refuge in Rouen, and, failing in this effort, assisted him with a large sum of money.
After the events of 10 August 1792 (storming of the Tuileries Palace), he fled to England, where he was the guest of Arthur Young. There also he met Young's nieces by marriage, Frances and Sarah Burney. The former gives a long description of him in her journal. After the assassination of his cousin, Louis-Alexandre, duc de La Rochefoucauld d'Enville, at Gisors on 14 September 1792 he assumed the title of duc de La Rochefoucauld.
He left England in 1794, and travelled to the United States. In 1795, he and five associates began a tour which covered much of the northern United States and Upper Canada. They crossed the Niagara River to Fort Erie and also saw Fort Chippawa. From there they travelled to Newark, Canada where they were entertained by Lieutenant Governor John Graves Simcoe.  Their trip was cut short when they were prohibited from entering Lower Canada. Insulted, François Alexandre Frédéric returned to the US and, in 1799, his exile ended, he returned to France.
Return to France
On his return to Paris, he was treated with dignity, but distantly by Napoleon. At the Restoration he entered the House of Peers, but Louis XVIII refused to reinstate him as master of the wardrobe, although his father had paid 400,000 francs for the honour. Successive governments, revolutionary and otherwise, recognized the value of his institutions at Liancourt, and he was for twenty-three years government inspector of his school, École nationale supérieure d'arts et métiers, which had been removed to Châlons-en-Champagne.
He was one of the first promoters of vaccination in France; he established a dispensary in Paris, and he was an active member of the central boards of administration for hospitals, prisons and agriculture. His opposition to the government in the House of Peers led to his removal in 1823 from the honorary positions he held, while the vaccination committee, of which he was president, was suppressed. The academies of science and of medicine admitted him to their membership by way of protest. Official hostility pursued him even after his death, for the old pupils of his school were charged by the military at his funeral.
His works, chiefly on economic questions, include books on the English system of taxation, poor-relief and education.
The second, Alexandre, comte de La Rochefoucauld (1767–1841), married a San Domingo heiress allied to the Beauharnais family. Mme de La Rochefoucauld became dame d'honneur to the empress Josephine, and their eldest daughter married a brother-in-law of Pauline Bonaparte, Princess Borghese. La Rochefoucauld became ambassador successively to Vienna (1805) and to The Hague (1808–1810), where he negotiated the union of the Kingdom of Holland with France. During the "Hundred Days" he was made a peer of France. He subsequently devoted himself to philanthropic work, and in 1822 became deputy to the Chamber of Deputies and sat with the constitutional royalists. He was again raised to the peerage in 1831.
The third son, Frederic Gaetan, marquis de La Rochefoucauld-Liancourt (1779–1863), was a zealous philanthropist and a partisan of constitutional monarchy. He took no part in politics after 1848. The marquis wrote on social questions, notably on prison administration; he edited the works of La Rochefoucauld, and the memoirs of Condorcet; and he was the author of some vaudevilles, tragedies and poems.
- Goyau 1913.
- The Journals and Letters of Fanny Burney (Madame D'Arblay). Volume 1, 1791-1792. Edited by Joyce Hemlow, et al. London: Oxford University Press, 1972, pp. 231-48.
- Chisholm 1911.
- Webster 1987.
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "La Rochefoucauld-Liancourt, François Alexandre Frédéric, Duc de". Encyclopædia Britannica 16 (11th ed.). Cambridge University Press.
- Goyau, Pierre-Louis-Théophile-Georges (1910). "The Duke of La Rochefoucauld-Liancourt". Catholic Encyclopedia 9. New York: Robert Appleton Company.
- Webster, T. S. "LA ROCHEFOUCAULD, FRANÇOIS-ALEXANDRE-FRÉDÉRIC DE, Duc de LA ROCHEFOUCAULD-LIANCOURT, Duc d’ESTISSAC". Dictionary of Canadian Biography Online.
|Wikimedia Commons has media related to François Alexandre Frédéric de La Rochefoucauld-Liancourt.|
Louis Alexandre de La Rochefoucauld d'Enville
|Duc de La Rochefoucauld
François, duc de La Rochefoucauld (1765-1848)