Shrouds have long held a special place among the sacred relics of Christendom. In the Middle Ages, shrouds, like holy relics, were the prize possessions of churches and cities. Cloaked in mystery, these artifacts have long been objects of reverence and awe, as well as sources of debates, quarrels, thefts, and excommunications. Shrouds--so some claim--provide visible testimony to faith. One in particular has drawn the interest of scholars, clergy,...