Well, probably, but English teacher Nathan Wilson has a a new theory:
The English instructor believes a medieval forger could have painted the image of a crucified man on a pane of glass, laid it on the linen, then left it outside in the sun to bleach the cloth for several days. As the linen lightened, the painted image of the man remained dark on the cloth, creating the equivalent of a photo negative.
Not so fast, says Dan Porter:
Shroud expert Dan Porter said that while Wilson's theory is ingenious, it does not produce images identical to those on the shroud.
"It is not adequate to produce something that looks like the shroud in two or three ways," said Porter, who lives in Bronxville, N.Y. "One must produce an image that meets all of the criteria."
Porter contends sun bleaching cannot have produced the image, which he and many others say is the result of chemical reactions on the cloth.
"A problem with Wilson's hypothesis is that sun bleaching merely accelerates bleaching that will occur naturally as the material is exposed to light," Porter wrote in an e-mail to The Associated Press. "Eventually, Wilson's sun bleach shroud image will fade into the background as exposure equalizes the bleaching."
Perhaps Wilson has just been watching too many movies:
Wilson said he wants to write a novel about his theory. The forger or perhaps forgers, Wilson theorizes, probably robbed a grave and pulled the aged shroud off a body, then crucified someone to obtain the blood and study the wounds of Jesus.
"Most likely it involved some real wicked people," Wilson said.
Knights Templar, no doubt.