roche (2) art (2) conservation (2) Conservation (2) Art (2) Art (2) Antiquities, Prehistoric (2) Prehistoric peoples (2) Art (2) art (2) puits (1) mur (1) technologie (1) état (1) science (1) ministère (1) chaux (1) plomb (1) laboratoire (1) innovation (1) analyse (1) verre (1) dégradation (1) cuivre (1) mosaïque (1) grotte (1) Deterioration (1) Composition (1) Area (1) Death and burial (1)