Jean-Marc Nattier – Marie-Josephe of Saxony, Dauphine of France (1727-1752); also called Madame de France Château de Versailles

The picture has something of this: people, woman, dress, portrait, costume, princess, veil, traditional, wear, queen, royalty, theater, antique, vintage.
Perhaps it’s a painting of a woman in a white and gold dress sitting in a chair with a cane in one hand.