Portrait of an unknown woman in a white cap Grigory Serdyukov (1744-1785)

The picture has something of this: portrait, people, crown, veil, aura, lid, Renaissance, man, saint, monarch, queen, cape, engraving, royalty.
Perhaps it’s a painting of a woman wearing a white dress with a blue ribbon around her neck and a blue flower on her left side of her left ear.