Agnolo Bronzino's "Portrait of Bia de' Medici" (c. 1542) depicts the young daughter of Cosimo I de' Medici. This posthumous portrait, painted in the Mannerist style, is celebrated for its serene beauty and technical virtuosity.

Agnolo Bronzino's portrait of Bia de' Medici, painted around 1542, captures the young daughter of Cosimo I de' Medici, Grand Duke of Tuscany. Bia died at the age of five, and this posthumous portrait, commissioned by her father, presents her as an idealised figure, rather than a realistic likeness. Bronzino was a leading painter of the Florentine Mannerist style, known for its elegance, refinement, and attention to detail. The portrait depicts Bia in a formal pose, wearing a dress of pale satin with puffed sleeves and a gold chain. She also wears pearls around her neck and in her ears. The cool, porcelain-like complexion and smooth finish are typical of Bronzino's technique. The background is a simple, dark blue, which serves to isolate the figure and emphasise her delicate features. The painting is celebrated for its technical virtuosity and its ability to convey a sense of serene beauty and dignity, despite the sitter's young age and tragic fate. Today, the painting is held in the Uffizi Gallery, Florence, and remains one of Bronzino's most recognisable works. It is a fine example of Renaissance portraiture and the Mannerist style.