Lady Constance Leveson-Gower (1834-80), later Duchess of Westminster Franz Xavier Winterhalter (1805-1873)

The picture has something of this: veil, bride, wedding, fashion, dress, woman, girl, portrait, model, bridal, people, beautiful, glamour, retro, lady, sexy, hair.
Perhaps it’s a painting of a woman in a white dress with a flower in her hair, wearing.