text: Conservation The shroud has undergone several restorations and several steps have been taken to preserve it to avoid further damage and contamination. It is kept under laminated bulletproof glass in an airtight case. The temperature- and humidity-controlled case is filled with argon (99.5%) and oxygen (0.5%) to prevent chemical changes. The shroud itself is kept on an aluminum support sliding on runners and stored flat within the case.
  Religious views
  The Gospels of Matthew, Mark, and Luke state that Joseph of Arimathea wrapped the body of Jesus in a linen shroud "sindon" and placed it in a new tomb. The Gospel of John says he used linen cloths "othonia".
  After the resurrection, the Gospel of John states: "Simon Peter came along behind him and went straight into the tomb. He saw the linen cloths [othonia] lying there, as well as the cloth that had been wrapped around Jesus' head. The cloth was still lying in its place, separate from the linen."
  The Gospel of Luke states: "Peter, however, got up and ran to the tomb. Bending over, he saw the linen cloths [othonia] lying by themselves."
  In 1543, John Calvin, in his book Treatise on Relics, explained the reason why the Shroud cannot be genuine: