King Brennus of Gaul captures the city of Rome; Marcus Furius Camillus expels King Brennus from Rome

Dating to 1450, the portrait demonstrates the portrait tradition that Giovanni di ser Giovanni Guidi contributed to within the Early Renaissance. Painted during the flourishing of the Early Renaissance, the work balances individual likeness with the idealized presentation expected by fifteenth-century patrons. By the mid-fifteenth century, the innovations of Masaccio, Brunelleschi, and the Van Eycks had fundamentally altered the possibilities of painting, establishing perspective, oil glazing, and naturalistic light as standard tools.

The portrait is rendered with skilled technique characteristic of Giovanni di ser Giovanni Guidi's best work. The tempera medium, applied in thin layers of egg-bound pigment over a prepared gesso ground, the subtle gradations of flesh tone and the textural contrasts between skin, fabric, and background that give the image its convincing presence.