Thanks to the Aureus and Atmoce projects funded by the French Région Centre-Val de Loire, a metal analysis database for ancient coins, especially Celtic coins, was recently developed at the IRAMAT laboratory in close partnership with the MSH Val de Loire. Interoperable, in particular with the Gallica database (BnF), the AeMa database will make available to the scientific community the results of elemental analyses carried out at IRAMAT on ancient gold, silver and copper alloy coins by LA-ICP-MS (precious metals) and Fast Neutron Activation (copper-based alloys). This paper will report on the thinking behind the development of this database and will present its structure and possibilities in the current context of Linked Open Data.