The analysis of the interventions (restorations, transformations etc.) performed in ancient edifices presents further difficulties, when sacred buildings are concerned, since their relation with a deity is an additional factor, which can affect the undertaking of the necessary works. This factor alone or in combination with others (political, financial etc.), but always in close relation with the practical indispensability of an intervention, has a different importance and impact in each case. When it can affect the decision for the undertaking of the work, then it sometimes has a positive influence on the works by speeding them up or a negative one, which leads to the postponement or even the cancellation of the project.