The Baroque monuments of Modica (Eastern Sicily): assessment of causes of chromatic alteration of stone building materials

摘要

The Baroque monuments of several cities in eastern Sicily, built of local calcarenitic stone, are often subjected to conservation treatments, since they undergo many forms of alteration and degradation which can cause significant damage. However, a recent study of these building materials (Barone et al. in Environ. Geol. 54:1501, 2008) has demonstrated that some protective products, once applied, cause irreversible chromatic alterations.