Hylda, Daughter of Asher and Mrs. Wertheimer John Singer Sargent (1856-1925)

The picture has something of this: people, wear, dress, portrait, woman, veil, wedding, gown, model, bride, fashion, jewelry, costume, outfit, music, skirt, necklace, princess.
Perhaps it’s a painting of a woman in a white dress standing in front of a table with a vase of flowers.