Comment: The Shroud of Turin is probably a medieval forgery. Radiocarbon 14 tests performed back in 1988 dated the shroud to AD 1260–1390, but as usual these results have been called into question. For example, in 2013, USA Today announced that "new scientific tests on the Shroud of Turin, which went on display Saturday in a special TV appearance introduced by the Pope, dates the cloth to ancient times, challenging earlier experiments dating it only to the Middle Ages."
When it comes to the dating of the shroud, all I can say is good luck trying to sort all this stuff out. If you aren't an expert on radiocarbon dating, you don't have a prayer of figuring out which tests, if any, were accurate, and the fact that the experts themselves can't agree would seem to call into question the value of radiocarbon dating in this particular case.