There are those who believe that The Turin Shroud is a genuine artefact, but not that of Jesus Christ. Carbon dating gives the approximate date of the shroud as early 14th Century, and this has led to the widespread belief that the image is that of Jacques De Molay, the Grand Master of The Knights Templar who was executed in Paris in 1314. It is, as one might expect, a hotly disputed theorem, but it makes a refreshing change to hear that it might be a genuine relic but not relating to Christ. Here's the small Wikipedia entry about it:
"Freemasons often weave legends around the life and legacy of Jacques de Molay, claiming with little or no proof that Molay was a key figure connected to other stories of mystery. In the 2001 book The Second Messiah: Templars, the Turin Shroud, and the Great Secret of Freemasonry, is a claim that the Turin Shroud is actually an image of Jacques de Molay, not of Jesus Christ as is common belief.
There is no reliable basis for saying that the Shroud depicts Molay; however, it is true that there seems to be a connection between the provenance of the Shroud of Turin and the Templars. The French Knight Geoffroi de Charny's widow, Jeanne de Vergy, is the first reliably recorded owner of the Turin shroud. Some believe that her husband of similar name was nephew to Geoffroi de Charney Geoffroi de Charney, Preceptor of Normandy for the Knights Templar, and the associate of Jacques de Molay who was both sentenced to lifetime imprisonment with him, and then burned at the stake with him in 1314 after both proclaimed their innocence."
And, when one sees an image of Jacques De Molay, one can see how credence for this unlikely theorem has gained in popularity: