The Shroud of Turin

The Shroud of Turin is a linen cloth about fourteen feet long, kept in the cathedral of Turin, bearing the faint front-and-back image of a man who was scourged, crowned with thorns, nailed through the wrists, and pierced in the side. For believers it is the burial cloth of Christ; for skeptics it is a medieval work.

Its undisputed history begins around 1354 in Lirey, France. The strangeness of the image was not fully appreciated until 1898, when Secondo Pia photographed it and found that his glass-plate negative resolved into a far more detailed, lifelike figure than the cloth shows the naked eye. The image behaves like a photographic negative — a property no one had reason to build into a medieval forgery, because photography did not yet exist.

The Image

In 1978, a team of roughly thirty scientists, the Shroud of Turin Research Project (STURP), had five days of direct access to the cloth. They found the image confined to the topmost fibrils of the threads — microns deep — with no pigment, no binder, no brushstrokes, and no directionality. It carries three-dimensional, distance-encoded information: the closer the body would have been to the cloth, the darker the mark. The bloodstains are real blood, with heme and bilirubin present, and they were laid down before the image formed rather than painted over a drawing. STURP's conclusion was narrow: this is not a painting, and the mechanism that formed it is unknown.

The dissent on the record belongs to microscopist Walter McCrone, who worked from STURP's tape-lift samples and reported iron oxide and vermilion he read as evidence of a painting. Most of STURP's chemists rejected his interpretation, and the dispute was never fully resolved.

The 1988 Date

In 1988, samples cut from one corner went to three independent laboratories — Oxford, Arizona, and Zurich — which agreed on a date of roughly 1260 to 1390 AD. The result was published in *Nature* in 1989: medieval, consistent with the cloth's first appearance in Lirey.

The Date in Dispute

The sample was a single corner, a spot handled for centuries. Raymond Rogers, originally a STURP chemist, argued in 2005 that the dated region was chemically unlike the main cloth and likely an interwoven medieval repair — an "invisible reweave." When the laboratories' raw measurements were later released, statistical reanalyses found inter-laboratory inconsistency and a spatial gradient in the dates across the sample, a sign the sub-samples were not homogeneous.

Newer Dating

Other methods have pointed back the other way. A 2022 study from Italy's Institute of Crystallography used Wide-Angle X-ray Scattering to read cellulose degradation and reported aging consistent with a cloth around 2,000 years old — though the method depends on assumptions about the cloth's storage temperature and humidity. A 2024 analysis of the flax pointed toward a Levantine origin. Earlier strands — pollen reported from Palestine (methodologically contested), travertine aragonite dust said to match Jerusalem limestone, and a weave resembling first-century textiles from Masada — each carry their own disputes.

What Followed

Researchers have been pressing for a new STURP-style examination campaign, ideally including fresh radiocarbon samples taken from several non-corner locations at once.

A Note on the Sequence

The bloodstain patterns and the position of rigor have been analyzed against Jewish Passover burial customs — the haste described in John's account, a body wrapped unwashed — and the serum separation visible at the side wound is consistent with a piercing made after death.