The Mass of St. Gregory, from a Book of Hours

Art Historical Context

This exquisite manuscript cutting, *The Mass of St. Gregory*, created by the Flemish illuminator Willem Vrelant around 1460–70, offers a glimpse into the devotional artistry of late medieval Europe. Vrelant, a prominent Bruges-based master active in the mid-15th century, specialized in luxurious Books of Hours—personal prayer books cherished by the nobility and clergy for daily worship. Cut from such a volume, this tiny panel (just 10.5 × 6.2 cm) captures the legendary miracle of St. Gregory the Great, who during Mass beheld a vision of Christ emerging from the altar, affirming the doctrine of transubstantiation. Such scenes were popular in religious art, blending theology with vivid storytelling to inspire faith. Rendered in tempera paints and shimmering liquid gold on vellum parchment, the work exemplifies the refined techniques of Netherlandish illumination. Fine brushwork brings figures to life with expressive gestures and intricate details—like the folds of ecclesiastical robes and golden halos—while the gold shell heightens the divine glow, evoking heavenly light. Housed in the Art Institute of Chicago's Prints and Drawings department, this fragile treasure highlights the era's fusion of piety and opulence, where manuscripts rivaled panel paintings in sophistication. Visitors will appreciate how Vrelant's style bridges Gothic intricacy and emerging Renaissance naturalism, making sacred narratives intimately accessible in an age before printed books.