Hedvig Charlotta Nordenflycht (1718-1763) Johan Stålbom (Stalbom)

The picture has something of this: people, ancient, antique, man, portrait, Renaissance, necklace, historic, person, vintage, woman, god, famous.
Perhaps it’s a close up of a painting of a woman in a white dress with a blue ribbon around her neck and a blue flower in her left hand.