In Lady Alethea Talbot, Countess of Arundel, Peter Paul Rubens presents a striking portrait of the noblewoman. The painting features rich colors, primarily deep reds and golds, which highlight her opulent attire. Lady Alethea is depicted in a three-quarter pose, exuding confidence and grace.

The background is a soft, muted color that enhances her presence without distraction. The painting is executed in oil on canvas, a common medium for Rubens during the Baroque period. The artist's technique is evident in the detailed rendering of fabric and the play of light on Lady Alethea's face. The composition is balanced, with the figure centrally placed, drawing the viewer's attention.

Rubens' characteristic brushwork adds a sense of vitality to the portrait. Peter Paul Rubens was a leading figure of the Baroque movement, known for his dynamic compositions and vivid color palette. This portrait, created in the 1620s, reflects the artist's ability to capture the personality and status of his subjects. An interesting fact about this work is that Lady Alethea was the wife of the Earl of Arundel, a prominent patron of the arts, which may have influenced Rubens' choice to paint her.