marc-antoine-nicolas de croismare, marquis of lasson (normandy, 1694 – 3 august 1772, parish of saint-roch in paris), was a french dilettante, mostly known for having inspired "the nun" to denis diderot. he also was depicted as "m. le marquis de roquemaure" by italian economist ferdinando galiani, in his "dialogues sur les commerce des blés" (1770).