Pierre Louis Jean Casimir de Blacas

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The Duke of Blacas Peer of France, OSE, LH, OSM
France Ambassador to the Holy See
In office 11 June 1817 – 16 September 1824
Appointed by	Louis XVIII
France Ambassador to the Two Sicilies
In office 8 July 1815 – 11 June 1817
Appointed by	Louis XVIII
Chief Minister of France
In office 2 May 1814 – 8 July 1815
Monarch	Louis XVIII
Preceded by	The Prince of Talleyrand
Succeeded by	Office abolished and replaced by Prime Minister's office
Minister for the King's Household
In office 4 June 1811 – 8 July 1815
Monarch	Louis XVIII
Preceded by	The Duke of Avaray
Succeeded by	Office vacant Jacques Lauriston (1820)
Personal details
Born	(1771-01-20)20 January 1771 Avignon, Comtat Venaissin, Papal enclave in France
Died	17 November 1839(1839-11-17) (aged 68) Vienna, Austria
Political party	Ultra-royalist
Spouse(s)	Henriette du Bouchet de Sourches, Countess of Montsoreau ​ ​ (m. 1814⁠–⁠1839)​
Children	Louis, Duke of Blacas
Profession	Military officer, diplomat, antiquarian
Military service
Branch/service	French Royal Army
Years of service	1790–1814
Rank	Maréchal de camp Second lieutenant
Unit	Army of Condé (1791–1801) 15th Dragoon Regiment (1790–1791)
Battles/wars	French Revolutionary Wars War of the Second Coalition Hundred Days

Pierre-Louis Jean Casimir, Count of Blacas d'Aulps (10 January 1771 – 17 November 1839), later created 1st Duke of Blacas (1821), was a French antiquarian, nobleman and diplomat during the Bourbon Restoration.^[1]