A modern biography brought to general attention his other roles, as an arbiter of taste, an influential art critic and an urbaniste.
Petit de Bachaumont was of noble family and was brought up at the court of Versailles.
He passed his whole life in Paris, however, as the centre of the salon of Mme Doublet de Persan (1677–1771), where criticism of art and literature took the form of malicious gossip.
A sort of register of news was kept in a journal of the salon, starting in 1762, which dealt largely in scandals and contained accounts of books suppressed by the censor.
The register was continued by Pidansat de Mairobert (1707–1779), who may have had a greater hand in it from the start, and by others, until it reached 36 volumes (covering the years 1774-1779).
It is of some value as a historical source, especially for prohibited literature, and full of anecdotes, for which it was sieved by the brothers Goncourt, who revived interest in this obscure figure, whom they presented as the anecdotier parfait, the reputation, as the "perfect recounter of anecdote" to the present time.
Petit de Bachaumont's studied "indolence", remarked upon in his obituary, was a stylish pose.
His major published writings are Essai sur la peinture, la sculpture et l'architecture (1751) and his surveys of the Paris salons of 1767 and 1769, in which aesthetics and cultural politics were inseparably entwined.