Do you think the "Shroud of Turin" is authentic?
Some background from wiki:
"The Shroud of Turin (or Turin Shroud) is a linen cloth bearing the image of a man who appears to have been physically traumatized in a manner consistent with crucifixion. It is kept in the royal chapel of the Cathedral of Saint John the Baptist in Turin, Italy. It is believed by many to be the cloth placed on Jesus of Nazareth at the time of his burial."