Few works in the Baroque period were as openly polemical as The Victory of the Eucharist over Heresy by Peter Paul Rubens, created around 1650. This painting belongs to a celebrated series commissioned by the Spanish Infanta Isabella Clara Eugenia for the Convent of the Discalced Carmelites in Madrid, intended as visual propaganda in the Counter-Reformation struggle. Rubens’ designs were so influential that they were widely reproduced as tapestries and engravings, spreading their message across Catholic Europe.

The series was praised in its day for its "ardent zeal for the true faith," a phrase recorded by a contemporary Spanish chronicler. At the heart of the scene, the Eucharist—represented by a radiant monstrance—advances triumphantly, carried by angels and defended by the Church Militant. Below, figures personifying Heresy and Discord are cast down, their broken symbols and torn books scattered at their feet. Rubens uses dramatic lighting to separate the divine from the defeated: the golden glow envelops the Eucharist, while the heretics writhe in shadow.

The composition echoes the energy of The Triumph of the Name of Jesus by Giovanni Battista Gaulli, but Rubens’ figures are more muscular and dynamic, emphasizing the physicality of spiritual conflict. The original painting’s precise medium is uncertain, as the most famous surviving versions are tapestries woven after Rubens’ designs, with several oil sketches attributed to his workshop. The commission marked a high point in Rubens’ later career, reflecting his close ties to the Spanish Habsburgs and his role as a visual architect of Catholic renewal. Over centuries, the tapestries and sketches have been dispersed among European collections, with notable examples in the Museo del Prado and the Monasterio de las Descalzas Reales.

Scholars still debate the authorship of some variants, but all agree on the work’s significance as a bold statement of faith in art.