In Eleonora of Toledo, Agnolo Bronzino presents a striking portrait of the Duchess of Florence. The painting features rich colors, particularly deep greens and reds, which enhance the figure's elegance. Eleonora is depicted in a lavish gown adorned with intricate patterns, showcasing her status.

The background is a dark, muted tone that emphasizes her presence and the detailed textures of her attire. The painting is executed in oil on panel, a common medium during the Renaissance. Bronzino's technique is characterized by smooth brushwork and a meticulous attention to detail, particularly in the rendering of fabrics and skin tones. The composition is balanced, with Eleonora positioned centrally, drawing the viewer's gaze.

The use of light and shadow adds depth, highlighting the contours of her face and the folds of her dress. Agnolo Bronzino was a prominent painter of the Italian Renaissance, known for his portraits and allegorical works. Eleonora of Toledo was commissioned by Cosimo I de' Medici, reflecting the political power of the Medici family. An interesting fact about this work is that it captures not just the likeness of Eleonora but also her role as a symbol of the Medici's wealth and influence in Florence.

The painting remains a significant example of Mannerist portraiture.