Who is Katherine of Aragon from the novel, Wolf Hall?

Katherine of Aragon is the Queen of England, mother of Princess Mary, and first wife of Henry VIII. Devoutly Catholic, Spanish in origin, beautiful, and kind, Katherine vehemently opposes the idea that her marriage to Henry is unsound based on the fact that she was previously married to Henry’s older brother. She rallies most of Christendom to her defense, though in the end, all comes to naught as Henry marries Anne Boleyn, regardless.