>ping< I attended a three day seminar on the Shroud and it’s as authentic as possible; the dating was taken from a 13th. century repair job and not from the actual shroud itself.
While essentially correct, one slight correction. The repaired areas the flawed 1988 carbon dating Shroud sample was extracted was a 16th Century repair. This repair used a technique developed during the fourteenth Century called "French Invisible Reweaving" which was used to repair moth eaten, torn or otherwise worn tapestries or arrases, replicating the missing cloth and making the cloth appear to match the area surrounding where the damage had been by expertly dying thread, skillful re-intertwining broken ends of new to old threads, and matching weave patterns.