Matthias Grunewald's 1516 Isenheim altarpiece reveals Christ's death without disguise - grotesque and terrifying - but it also features the most sensational resurrection, writes Jonathan Jones IT ...

The Musée Unterlinden in Colmar, near the German border in northeastern France, sits at the end of many an art pilgrimage to a spectacular work: the Isenheim Altarpiece (1512-16) by Matthias ...