The conservation and restoration of cultural objects of worship have proved to be a problematic activity, mainly due to the lack of a conceptual frame that considers their specific characteristics. For example, the classic theory of restoration does not take into account the relationship between users and objects. This produces ethical ambiguities as well as isolated and uncritical solutions. Contemporary efforts of conceptualizing this relationship between users and objects of worship are not satisfactory either. This paper tries to show that, as conservation-restoration has an epistemological and a moral dimension, if both are addressed at the same time, a series of normative principles will emerge from this union, and to a large degree will prevent casuistic interventions, rhetorical discussions in this field and/or superficial decisions made under the pressure of the users.