A portrait of Eleonora of Toledo (1519–1562), Duchess of Florence and wife of Cosimo I de' Medici, by court painter Agnolo Bronzino. Executed in the Mannerist style, the painting is an exemplar of mid-16th-century court portraiture. Set against a deep blue background, the composition displays precise rendering of rich textiles, a pearl-embroidered partlet, and fine jewelry, combined with smooth, enamel-like skin tones.