Mme Jacques-Benoit Loys, nee Marie Combe Francois-Hubert Drouais (1727-1775)

The picture has something of this: portrait, people, woman, veil, fashion, dress, jewelry, wear, model, girl, bride, necklace, retro, lady, glamour, costume, beautiful.
Perhaps it’s a portrait of a woman in a white dress with a red sash around her neck and a pearl necklace.