Mrs. Archibald Douglas Dick (nee Isabelle Parrott) John Singer Sargent (1856-1925)

The picture has something of this: people, wear, veil, portrait, woman, royalty, princess, sash, dress, crown, retro, queen, Renaissance, bonnet.
Perhaps it’s a painting of a woman in a white dress with a red flower in her hair standing in front of a chair.