Musée du château de Mayenne
The Musée du château de Mayenne in France — a Musée de France holding a major medieval archaeological collection — migrated to the open-source CollectiveAccess with the French integrator idéesculture, using a bespoke 'museesDeFrance' plugin. The plugin adapts CollectiveAccess to France's statutory requirements, including generating the official decennial inventory audit (récolement) and locking inventory records against retrospective tampering. A French example showing that open-source collections software can meet strict national museum-compliance mandates.