The age of the "cloth of Turin" is no more relevant than the age of the cloth that you wash you floor with.
Clothes, crosses, donkeys and other accessories are completely irrelevant. Considering them is PURE IDOLATRY.
Try to imagine how could anyone prove the immortality of consciousness to people who don't even suspect it. He would need to die and then come back, right?
"The greatest danger concerns materialism..." as Thaoraexpressed it. Try to remember this. Use your Intellect.