What is archeology? Scientific study of the lost civilizations, from their vestiges. What are the main periods of prehistory? The Upper, Middle and Lower Palaeolithic, the Mesolithic and the Neolithic which includes the Aurignaco-Gravettian period. What makes it possible to justify a human presence on the Arcy site for nearly 200,000 years? Human remains, the lithic industry, paintings and engravings, digital traces. How is defined the age of paintings, drawings? By carbon dating. Do the paintings correspond to a particular period, do they have a particular style characteristic of the site? We talk about the "Arcy School": minimalist, clean, animals with unclosed legs, dated the Aurignaco-Gravettian period. Same question for engravings? They are much more complete in terms of details and features but cannot be dated. What is a "negative hand"? The hand is placed on the wall before the placing of pigment around it. In contrast, for the "positive hand", the hand was laid on the wall after being soaked in pigment. What are the other prehistoric remains found on the site? Human and animal bones, vestiges of the lithic industry, jewels, ornaments, pigments. Did prehistoric men live in caves adorned like the Great Cave, or did they have a particular vocation? According to current interpretations the cave was a place called "sanctuary", that is to say used for artistic purposes. How do you protect the heritage of caves? By limiting the number of people per visit, cleaning it regularly with care, using appropriate lighting called "cold lights" and raising awareness among staff and visitors about its protection.