ABSTRACT
In this work some examples are given for the diversity of problems connected to the influence of air pollutants on objects of art in the light of these different case studies on museums and churches in Europe. Gaseous and particulate air pollutants were investigated indoors and outdoors these museums and churches. The obtained results show that very different situations can be encountered and no universal advice can be given to conservators. Nevertheless some basic and often reoccurring problems in indoor environments could be identified.
