Greetings people! It's been a while since this thread petered out, so I'm glad you're all still here. There is something new to discuss, if any of you can bring any historical expertise to the subject.
Last Autumn Charles Freeman had an article published in History Today magazine (it's online, but although I was a full member of the randi forum I seem to have had to start all over again, so can't link to it yet!), claiming that the Shroud of Turin had started life as a painted liturgical prop for the re-enactment of the visitation of the holy women to the tomb of Jesus on Easter morning, a rite known as the Quem Quaeritis ceremony, which originated in churches and later spread outside as a mystery play. He gave lots of evidence that 'shrouds' consisting of images painted on linen were extremely common throughout Europe, although as far as we know not a single one remains today (unless the Shroud is one). He also suggests that the Shroud transmutated from 'well known old sheet used in a play' to 'genuine burial cloth of Christ' via some kind of miracle that may have been attributed to it, but there is no evidence for this.
On the surface this seems quite plausible, but a number of powerful objections have been raised. Firstly it seems impossible for a painting to have lost so much pigment so uniformly that not single flake is visible today (even if there is indeed a microscopic scattering of iron oxide as described by Water McCrone).
Secondly, although engravings of the expositions of the Shroud invariably show a well demarcated body, usually with a loincloth and sometimes wearing a crown of thorns, actual copies of the Shroud, of which earliest is from 1516 or so, often show the image as vague, amorphous and nude, much as it is today.
Thirdly, there is no evidence that the Shroud was associated with any miracles before it came to be venerated at Lirey in the 1350s.
Any ideas?
One more thing. There are a number of regular contributors to shroudstory.com who follow various other Shroud discussion sites, including this one. The good thing about shroudstory is that commenters are fairly evenly divided between pro- and non- authenticists, with varying degrees of commitment to their views, and some surprising expertise in the various different disciplines connected to the Shroud. It is not true that "they" have been invited to read this site and that "they" have refused, nor that, if any new points get raised here, they don't get discussed 'over there.' I think the last time this forum appeared on shroudstory was to discuss my finding a small extraneous thread in the radiocarbon sample (June 2013), which I first mentioned here. If anybody here has anything interesting to say about Charles Freeman's hypothesis, I have no doubt that will be discussed there as well.