Matthias Grünewald's Isenheim Altarpiece, painted between approximately 1512 and 1516 for the hospital chapel of the Antonite monastery at Isenheim in Alsace (now in the Musée d'Unterlinden, Colmar), contains the most physically extreme and theologically concentrated depiction of the Crucifixion in Western art. The Crucifixion panel - the first of three views visible as the altarpiece is opened - has shaped the Western imagination of Christ's suffering more deeply than any other single image, and its influence on the history of art extends from Reformation devotion through Expressionism to the present.
The Altarpiece's Function
The Isenheim monastery of the Order of St Anthony ran a hospital that specialized in treating ergotism - a disease caused by the fungus Claviceps purpurea that infected rye crops and produced horrific symptoms: burning sensations in the limbs (hence "St Anthony's Fire"), gangrenous blackening and loss of extremities, and convulsions. Patients at the Antonite hospital were brought before the altarpiece as part of their treatment: the devotional practice of contemplating Christ's suffering in his wounds was understood to be therapeutic - both spiritually consoling and, in the Antonite theology, physically connected to the miraculous healing promised through the intercession of St Anthony.
This function determines everything about the Crucifixion panel. The sores covering Christ's body are not artistic convention or symbolic decoration but a deliberate identification of Christ's wounded body with the disease-ravaged bodies of the patients standing before the image. The message is precise: the Christ who suffered as you suffer, whose body looked as yours looks, is also the Christ of the Resurrection panel (the altarpiece's third state, opened for Easter) - the one whose damaged body was raised glorified and whole.
The Crucifixion Panel
Christ hangs on the cross against a sky gone black - fulfilling Matthew 27:45: "From noon until three in the afternoon darkness came over all the land." The cross bends under the weight of the body; this structural deformation is unusual in Crucifixion imagery and emphasizes the physical mass and reality of Christ's death. The body is covered in lacerations from the scourging, with thorns embedded in the flesh; the hands and feet are twisted into the contorted postures of tetanic agony. The skin has the greenish-yellow pallor of a corpse.
At the foot of the cross stand two groups: on the left, the swooning Mary supported by John the Evangelist, and Mary Magdalene kneeling with her hands raised in grief. On the right, John the Baptist stands pointing at the crucified Christ with an enormous extended finger, accompanied by the Lamb of God holding a cross and bleeding into a chalice. The inscription beside the Baptist - "He must increase, but I must decrease" (John 3:30) - is here understood as the Baptist's last word before his death, pointing beyond himself to the one whose suffering the image depicts.
Isaiah 52-53 and the Suffering Servant
The theological framework of the image is the Suffering Servant of Isaiah. Isaiah 52:14 - "his appearance was so disfigured beyond that of any human being and his form marred beyond human likeness" - and Isaiah 53:5 - "he was pierced for our transgressions, he was crushed for our iniquities; the punishment that brought us peace was on him, and by his wounds we are healed" - are visually enacted with a literalness unprecedented in Western art. The "wounds" of Isaiah 53:5 by which "we are healed" were, for the Antonite patients, both spiritual (forgiveness) and physical (the healing they sought from St Anthony's intercession).
The Altarpiece's Three States
The Isenheim Altarpiece opens in three stages. The first (closed) state shows the Crucifixion. The second state (opened once) shows the Annunciation, a concert of angels, the Nativity, and the Resurrection. The third state (fully open) shows the Meeting of St Anthony and St Paul the Hermit, the Temptation of St Anthony, and a carved shrine of St Anthony enthroned with Sts Augustine and Jerome. The theological progression from death (Crucifixion) to new life (Nativity/Resurrection) to sanctified life (the Anthony saints) structured the liturgical year's movement from Lent through Easter and Ordinary Time.
Impact on Expressionism
When the altarpiece became widely known in the late 19th century (it had been relatively inaccessible in Colmar), it had an immediate and transformative effect on German Expressionist artists. Emil Nolde, Max Beckmann, Ludwig Kirchner, and Otto Dix all engaged with it directly. Dix's War Triptych (1929-1932) explicitly adopts the altarpiece structure while acknowledging Grünewald as its formal and theological model. The permission the Isenheim Altarpiece gave - to show extreme physical suffering without aesthetic mitigation, in the context of a theological argument about the significance of that suffering - was foundational for Expressionist sacred art.
Legacy
The Isenheim Crucifixion panel is, alongside Michelangelo's Sistine ceiling and Raphael's School of Athens, one of the three or four most significant paintings in Western art. Its theological argument - that the extreme physical suffering of Christ is the basis of his identification with and healing of human suffering - has never been more powerfully stated in visual form. It remains a pilgrimage destination and a primary reference point in any serious discussion of the theology of the Cross.