[1] He entered the French diplomatic service in 1823 and was given the title of baron in 1829 during the Bourbon Restoration.

He was dispatched to Bogotá (1838–1842) as chargé d'affaires during the Colombian Civil War, and later elsewhere in Latin America, before being recalled to Europe and then sent as Minister Plenipotentiary to Athens in 1850.

He served as Ambassador to London (1852–1863), traveling extensively, including to China and Japan in 1857 and 1858.

[2] On 9 October 1858, the Treaty of Amity and Commerce between France and Japan was concluded at Edo, to which he was a signatory; this treaty established diplomatic relations between the two imperial nations.

[5] Baron (1829) Knight, Order of Santiago (1839) Grand-croix, Légion d'honneur (1861) Media related to Jean-Baptiste Louis Gros at Wikimedia Commons