80px|thumb|right|Count of the French Empire
Horace François Bastien Sébastiani de La Porta (; 11 November 1771 – 20 July 1851) was a French general, diplomat, and politician, who served as Naval Minister, Minister of Foreign Affairs, and Minister of State under the July Monarchy.
Having joined the French Revolutionary Army in his youth, Sébastiani rose through its ranks before becoming a supporter of Napoleon Bonaparte. Sébastiani was the French Consulate's emissary to The Levant, notably drafting plans to reconquer Ottoman Egypt, and later served as the Empire's Ambassador to The Porte. In the latter capacity, he attempted to increase French influence and signaled pro-Russian activities in the Danubian Principalities, thus provoking the War of 1806–1812. In 1807, Sébastiani organized the defense of Constantinople during the Dardanelles operation. Recalled due to British pressure after the deposition of Selim III, he served in the Peninsular War and resided in the Alhambra, took part in the unsuccessful invasion of Russia, and defended the Champagne region in front of the Sixth Coalition.
Sébastiani recognized the Bourbon Restoration, but rallied with Napoleon during the Hundred Days, being elected to the Chamber for the first time in 1815. Briefly exiled after the return of King Louis XVIII, he was again admitted as a Deputy in 1819, sitting with the Left faction, supporting liberal politics, and coming into conflict with the Jean-Baptiste de Villèle Cabinet. After the July Revolution, he endorsed Louis Philippe I. Sébastiani's time as Foreign Minister saw France's involvement in the Belgian Revolution, its refusal to sanction the November Uprising, the controversial solution to a commercial dispute with the United States, and the French occupation of Ancona. In later years, he progressed in French Government service as an ambassador.
The 1847 murder of his daughter, Françoise, Duchess de Praslin indirectly helped spark the 1848 Revolution.
Early life
Born in La Porta, Corsica, Sébastiani was the son of a tailor and well-to-do craftsman, the nephew of Louis Sébastiani de La Porta, a Roman Catholic priest who was later Bishop of Ajaccio, and probably a distant relative of the Bonapartes. Horace Sébastiani had a brother, Tiburce, who rose to the rank of Maréchal de Camp. Initially destined for a religious career, Briefly dispatched as a secretary to Conte Raffaele Cadorna in Casablanca,
thumb|right|Sébastiani as a Lieutenant of the [[light infantry in 1793, by Jean-Baptiste Paulin Guérin (1835)]]
Sébastiani joined Lucien Bonaparte's entourage, In 1802, the Consulate sent him on his first diplomatic assignments in the Ottoman Empire, Ottoman Egypt, and other parts of The Levant. He publicized this view in a report, published by Le Moniteur Universel on 30 January 1803, he attempted to convince Sultan Selim III to exclude the Royal Navy from access through the Dardanelles. According to the aristocratic Wallachian memoirist and politician Ion Ghica, Selim "followed the advice of General Sébastiani, who tried to bring him to Napoleon's side", and saw a connection between Ypsilantis and the Serbian Uprising:
In February 1832, Sébastiani took initiative in ordering a French occupation of Ancona. The Revue argued that this was the most significant gesture of his career, and credited him with having planned it as an indirect but effective strike at Austrian economic interests, when implying that France would march into Rome and Trieste in the event of a war with Austria.
Among his last actions in office as Foreign Minister were negotiations with the United States over losses suffered by American citizens during the Napoleon's Continental Blockade, when several ships bearing the American flag were arrested in European ports, on suspicion that they were in fact serving British commercial interests (see Embargo Act of 1807). Raising much controversy, he set the sum France agreed to pay at 25 million francs, 10 million more than what committees of the Conseil d'État and Chamber had decided, although still significantly less than what had been asked by American plaintiffs. He retired from office after having a stroke which left him partly paralyzed, and traveled in the Italian Peninsula. He was later Minister of State for a short period of time. He was recalled and replaced by François Guizot after refusing, against his government wishes, to support the cause of Muhammad Ali's design to extend his rule out of the Egyptian realm by conquering Ottoman lands in Syria (see London Straits Convention). Adolphe Thiers later pointed out that he agreed with Sébastiani's view, which he defined as: