Abstract
Biodeterioration is one of the most serious problems faced by conservators of the Athens Acropolis monuments. In this contribution the authors present the strategy designed for its control on a large scale outdoor monument, as well as the complications encountered in situ because of numerous environmental and logistical parameters. Reference is made to the bibliographic and research phases of the project, the testing of selected biocides for their compatibility with the stone and conservation materials and their efficacy against micro-organisms in laboratory tests and in situ both over time and when used in combination with current conservation treatments. Co-operation with environmental microbiologists and botanists, the need for an interdisciplinary, holistic approach to causes and control of biodeterioration and the ceaseless role of conservation are also discussed.