When we see the face of Christ, why should we emphasize the particular face of Christ in the Shroud of Turin and not just a more comprehensive searching for his face, his personality, his expressions, his look, the self shining out through his words?
The answer lies in to the reply to the question on why three of the universal sacraments have a symbolic force limited to the Mediterranean region: olive oil, bread, wine.
Christ chose mediterranean symbolism. Why? Ratzinger reasoned out in his book Spirit of the Liturgy: God's incarnation binds us to the history of a particular place. It does not mean doing as we please, a typical tendency of those who want to invent a new liturgy, or new sacraments. No. "The elements become sacraments through connection with the unique history of God in relation to man in Jesus Christ."