Lady Astor. John Singer Sargent (1856-1925)

The picture has something of this: people, portrait, woman, dress, wear, sculpture, veil, actress, statue, fashion, performance, gold, model, baroque, royalty, gown, ancient.
Perhaps it’s a painting of a woman in a white dress standing in front of a stone column with her hands in her pockets and her right hand in her other hand.