The world's monuments, art objects and archaeology are at increasing risk of deterioration from environmental threats e.g. climate change, air pollution, and tourism. Microorganisms play a central role in these deterioration processes. They grow both on the surface and in the interiors of many materials. Our understanding of the role that the microbial community plays in these activities has improved significantly in recent years and a deeper understanding of the mechanisms of degradation is now possible. In addition, new tools have opened the door to the use of bacteria as protective agents. In this book, contributors have focused on the essential role that biodeterioration plays in both the deterioration and preservation of a wide range of materials. The volume brings together recent research by conservation microbiologists working in diverse environments. In addition papers are included on the effects of microbial biofilms and climate change on the biodeterioration process.