From allposters.
This portrait of Mme. de Boigne appears to date to the early 1830s with the full round skirt and probable sheer imbecile sleeves.
Keywords: Isabey, Adélaïde d'Osmond, Adèle d'Osmond, comtesse de Boigne, d'Osmond family, de Boigne family, Countess, French, curly coiffure, feathered hat, neck band, imbecile sleeves, full skirt