The
conservation of the Shroud of Turin refers to the
conservation-restoration and enduring preservation of the
Shroud of Turin to avoid further damage and contamination. Since 1578 the Shroud is kept in the Royal
Chapel of
Turin Cathedral (from 1694 to 1993 the Shroud rested in the Royal Chapel's Bertola
altar), under the
laminated bulletproof glass of the 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.