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Skeptical Inquirer's Shroud of Turin Questions

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The true skeptical inquirer thinks . . .

What is a tetradiplon?

There is significant evidence that, in Edessa and also in Constantinople, the cloth was kept folded in such a way that only the face was visible. By folding the cloth, doubled in fours (tetradiplon) that is exactly what results – a centered face of Jesus on a horizontal folded cloth – as seen in a 10th century painting of Abgar V holding a picture that is odd for its horizontal shape as a portrait.

In Constantinople, the cloth was sometimes ceremoniously unfurled, raised up like a vertical banner, in a way that showed a full frontal picture of Jesus as though rising from a grave. In 1201, Nicholas Mesarites, the sacristan of the Pharos Chapel where the Image of Edessa was kept, wrote: “Here He rises again and the sindon [=Shroud] … is the clear proof … still smelling fragrant of perfumes, defying corruption because they wrapped the mysterious naked dead body from head to feet.”

John Jackson, who was one of several physicists who physically examined the Shroud in 1978, used special raking light photography to reveal ancient fold marks on the Shroud. He found persistent creases exactly where expected and in the correct folding direction for just such a tetradiplon folding.

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Shroud of Turin and the Skeptical Inquirer


Fact: The 1988 carbon 14 dating used invalid samples snipped from a discrete medieval repair. Furthermore, kinetics constants for the loss of vanillin from lignin indicates that the cloth is at least twice as old as the dates determined by the carbon 14 dating with the faulty samples.

By some estimates, from examination of documenting photographs, there is sufficient new thread (about 60%) to allow adjusting the cloth's date to approximately the first century.

Fact: The images are formed by a brownish, complex conjugated carbon substance within a carbohydrate layer of starch fractions no thicker than 1/100 the diameter of a human hair.

The images are probably the product of an amino/carbonyl reaction.

Fact: The bloodstains are real blood. The blood is unusually red for old blood.

The blood probably stayed red and did not turn black as blood normally does because trace chemicals found in the starch fractions are hemolytic. Also, the blood is rich in bilirubin, a bile pigment produced when a human body is under severe traumatic stress. Bilirubin is bright red and stays red.

Fact: There is a faint, superficial face image on the back of the cloth.

This supports the hypothesis of an amino/carbonyl reaction.

Fact: There are sufficient descriptive historical records to suggest that the Shroud of Turin is the Edessa cloth (ca. before 544 to 944 CE) and the Bucoleon Palace grave cloth of Constantinople (ca. 944 - 1204).

Fragmentary evidence suggests that the Edessa Cloth originated in Jerusalem in the 1st century and that it is the burial cloth of Jesus of Nazareth.