Hellmouth (c. 1440) by the Master of Catherine of Cleves is one of the most striking and terrifying depictions of damnation in medieval Christian art. Painted as part of an illuminated manuscript, it visualizes the entrance to Hell as a monstrous, open-mouthed beast swallowing the damned—a symbol that merged biblical references to the “mouth of Sheol” with medieval imagination. The glowing reds, flames, and tortured figures evoke both horror and fascination, serving as a moral warning to the viewer about sin and eternal punishment. The artist’s meticulous detail and grotesque inventiveness transform theological fear into vivid imagery: sinners are devoured, demons gleefully torment, and the gaping jaws of the beast embody the inescapable power of divine judgment. In this miniature, the Hellmouth becomes not merely a symbol of destruction, but a portal into the medieval psyche’s darkest visions of salvation and doom.