An essay on the theme of the future of cultural property -- no longer solely a political-economic matter, but now in the hands of advanced science. The author quotes arguments regarding exhibitions featuring restored works and uses three examples of paintings by Raphael to propose a balanced approach to intervention and appraisal of results. The time-life element in a work of art is of utmost importance when deciding upon an intervention. The article advocates collaboration between scientists and art historians. -- AATA