Ancient Constructions as Markers of Tectonic Deformation

Many ancient structures such as temples were constructed on the basis of a very strict plan
and excellent workmanship. For this reason, even their slight deformation due to various effects (ground
instability, earthquake oscillations, etc.) can be identified, and it is possible to discriminate between
different types of deformation due to earthquakes and those due to other natural causes or to
anthropogenic effects. Two study cases are presented here: the Propylaia on the Acropolis and the temple
of Hephaistos (Hephaisteion) in the Agora at Athens. In both buildings deformation was produced by
earthquakes.