Wilson Engel Gilbert, Arizona, United States Detail of a patient suffering from advanced ergotism in the Isenheim Altarpiece Matthias Grünewald’s Isenheim Altarpiece Musée d’Unterlinden, France Perhaps the best known and least forgettable of all Renaissance art works depicting the graphic effects of disease is Matthias Grünewald’s Isenheim Altarpiece (1506–1515), now in the Musée d’Unterlinden, Colmar.1 On…