A detailed sixteenth-century engraving by Hieronymus Wierix depicting a powerful stallion, based on a design by Jan van der Straet.

This engraving, titled Eqvile Ioannis Avstriaci Caroli V, is a fine example of the technical precision associated with the Wierix family of Antwerp. Hieronymus Wierix, a prolific engraver of the period, produced this work after a design by Jan van der Straet, also known as Stradanus. The print belongs to a series documenting the horses of Don John of Austria, the illegitimate son of Emperor Charles V.

The composition presents a powerful stallion in a dynamic, rearing posture. The animal is rendered with anatomical focus, displaying the muscular definition and controlled energy typical of the period's interest in equestrian subjects. The horse wears a complex bit and bridle, reflecting the sophisticated horsemanship of the sixteenth-century European aristocracy. The background features a subtle, atmospheric landscape with distant architectural elements, providing a sense of scale and setting without distracting from the primary subject.

Wierix employs a refined system of cross-hatching and fine lines to model the horse's form, creating a sense of volume and texture in the coat. The Latin inscription at the base, 'Eqvus Regivs', identifies the status of the animal, while the surrounding text provides a classical framing for the image. This work demonstrates the collaborative nature of print production in the late sixteenth century, where the invention of a painter was translated into a reproducible medium by a master engraver. The clarity of the line work and the balanced composition make this a representative piece of Flemish printmaking, capturing both the aesthetic values and the cultural preoccupations of the era.