The topographical and thematic extension of the concept of monuments, as well as mere physical stress by pollution, aging of material, and wear of monuments have confronted conservation and preservation with a new world. The solutions of these problems in many cases differ from what was defined as conservation in 1964 by the Venice Charter. This raises the question whether the rules of conservation and preservation and the values of a monument are still valid. Discusses the relevance of the values of Alois Riegl, including <i>Alterswert</i> (age-value), and makes policy recommendations.