The sanctuary of Artemis in Vravrona, on the eastern coast of Attica, is counted among the most important religious complexes of antiquity. This study comprises a short presentation of the stoa of the sanctuary and its restoration. The deep landslide has seriously damaged all the buildings of the sanctuary. Therefore, the decay of the building materials has been recorded, according to macroscopic observations, and its basic agents have been estimated, on the basis of an environmental study. Given the aforementioned data, a proposal for the protection of the monument has been composed.