Portrait of Duchess Sforza Cesarini (d.1765) Pompeo Girolamo Batoni (1708-1787)

The picture has something of this: people, portrait, woman, dress, girl, wear, princess, model, queen, gown, costume, fashion, skirt, corset, jewelry, wedding.
Perhaps it’s a painting of a woman in a red and blue dress sitting on a green chair with a vase of flowers.