Princess Leonilla of Sayn-Wittgenstein Franz Xavier Winterhalter (1805-1873)

The picture has something of this: people, portrait, woman, wear, veil, jewelry, music, dress, Madonna, retro, costume, bonnet, fashionable, side view.
Perhaps it’s a painting of a woman in a blue dress with her hand on her chin and her hand under her chin, resting her chin on a pillow.