He first visited Paris, where he saw a good deal of d'Alembert, Diderot, Barthelemy, Raynal, Helvetius, Baron d'Holbach and others of that circle, and was often a welcome guest in the saloons of Madame Geoffrin and Madame du Deffand.
In Paris he frequented the salons, especially those of Mme Graffigny - whose niece, Mlle de Ligniville ("Minette"), afterwards Mme Helvetius and his lifelong friend, he is supposed at one time to have wished to marry - Mme Geoffrin, Mme du Deffand, Mlle de Lespinasse and the duchesse d'Enville.
Geoffrin, Helvetius, and the baron d'Holbach.
Neither the witty and lucid form in which the philosophers clothed their ideas in their satires, romances, stage-plays and treatises, nor the salons of Madame du Deffand, Madame Geoffrin and Mademoiselle de Lespinasse, could possibly have been sufficiently far-reaching or active centres of political propaganda.
Madame Necker entertained the chief leaders of the political, financial and literary worlds of Paris, and her Fridays became as greatly frequented as the Mondays of Madame Geoffrin, or the Tuesdays of Madame Helvetius.