The discovery or rediscovery of an object often raises the question of its authenticity and attribution. It is then necessary to perform a search in a specific methodological framework. The archival, historical, technical and stylistic studies allow the discovery of indices essential to determine a provenance. Conversely, when works have disappeared and are only known to us by some testimony; It is possible, through an investigation responding to the same methodological reasoning, to trace their trail and rediscover them in places sometimes unexpected.
The inventory and the classification are means of research, of understanding and of valorization without equal. Highlighted by publications (catalogs, articles, books) and communications, the works then enter into an enriched corpus. They become references.