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Laser techniques in conservation of stone and metals

After 30 years since the first experiment we may say that laser techniques are being widely employed today by conservators and restorers as the best choice for the most important tasks: (1) diagnostics about the state of conservation; (2) restoration intervention in the crucial cleaning phase; (3) monitoring of the deterioration processes. Many important experiences have been carried out in Europe along these topics, with significant validation cases and sustainable technology transfer. In this paper the activity carried out in the Tuscany Region will be reported with the monitoring of the most advanced activities carried out by the EC Action COST G7 "Artworks Conservation by Laser."