ABSTRACT
Generally, the authenticity principle has been discussed for the super-structures of historic monuments and not for their foundations. Interventions on the foundations or on the embankments on which some monuments have been built have not usually been deemed necessary, while there are many examples where either the type of the foundation or the embankment was developed in some special way according to regional characteristics, or the foundation or the embankment itself is of historic heritage. In this paper case studies of geotechnical interventions for the preservation and restoration of monuments are presented and discussed and questions are posed regarding the application of the authenticity principle.
