A nobleman born in Sarreguemines the son of Charles Victor Bachasson, Seigneur de Montalivet, Maréchal de camp, Knight of the Order of Saint Louis and Councilor Secretary of the King in the Chancellery of Corsica, etc., and second wife Marthe de Saint-Germain, Noble Femme, he was counsellor to the Grenobleparlement from 1785 à 1790, and, while in Valence, he became friends with a Napoleon Bonaparte, who was a young officer at the time. In 1788, during the bloody riots known as the Journée des Tuiles, he took the side of the revolt and was banished to his château in :it:Montmeyran|Montmeyran. Although supportive of the French Revolution, Bachasson enlisted in the Army of Italy in order to escape the Reign of Terror. After his return to France he was elected Mayor of Valence in 1795, and was commissioner for the département of Drôme under the French Directory.
After his 18 Brumaire coup, Napoleon called Bachasson to serve as préfet of the Manche and then Seine-et-Oise under the Consulate. With the start of the French Empire, Bachasson joined the Conseil d'État, became director of the Legion of Honor, and, from 1806, head of the Corps des Ponts et Chaussées. He became a Minister of the Interior in 1809, during the period when France was at the peak of its European territorial expansion. As Minister, Bachasson helped develop the infrastructure within the Empire by, for example, authorising the construction of new bridges and ports. He also oversaw large-scale urban works in Paris, the building of such monuments as the Arc de Triomphe and the :fr:Palais Brongniar|Palais Brongniar, as well as the expansion of sewage works and the digging of public fountains.
Restoration, later life, and legacy
In 1814, after the Six Days Campaign, Bachasson accompanied Empress Marie Louise all the way to Blois, and then retired to his property in Montmeyran. He returned to public life during the Hundred Days, and became Intendant General General of the Crown and a Peer. With the start of the Bourbon Restoration, he was denied peerage until 1819. He died in his Castle of Lagrange-Montalivet in :fr:Saint-Bouize|Saint-Bouize. Montalivet Street in Paris, a Montalivet Square in Valence, Montalivet Avenue in Caen, Comte de Montalivet Street in Sarreguemines and the Montalivet Islands in Western Australia, are all named after him.
Family
He married Louise Françoise Adélaïde de Saint-Germain, who was said to be a daughter of Louis XV of France - with whom she shared the same striking resemblance in the strongly marked Bourbon traits also found in other of his illegitimate offspring - by Catherine Eléonore Bernard, and had issue:
Charles Bachasson de Montalivet
Simon Pierre Joseph Bachasson, 2e Comte de Montalivet, unmarried and without issue
Josephine Francine Adelaïde de Montalivet, married on 14 June 1827 Benjamin Marie de Tascher, son of Pierre Jean Alexandre, 1er Baron et 1er Comte de Tascher, and wife Catherine Flore Bigot de Chérelles de La Boyerie, and had issue
Charles Bachasson de Montalivet, unmarried and without issue
