Kreuzigungsaltar: Apostel Simon, Judas Thaddäus und Matthias Rückseite: Hl. Gereon (mit Stefan Lochner)

Master of the Heisterbach Altar's Kreuzigungsaltar: Apostel Simon, Judas Thaddäus und Matthias Rückseite: Hl. Gereon (mit Stefan Lochner) (1435) demonstrates the vitality of fifteenth-century European painting in the early fifteenth century, a transformative period in European art. Master of the Heisterbach Altar approaches the subject with distinctive artistic vision, producing a work of both technical accomplishment and expressive power. 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.

Executed with skilled technique and attention to careful observation, the work reveals Master of the Heisterbach Altar's characteristic approach to composition and surface. The treatment of light and the careful modulation of color create visual richness within a unified pictorial scheme.