Denier - Charles II Château-Porcien mint

Château-Porcien, a minor Carolingian stronghold in the Ardennes, was granted minting rights under the reorganization of royal coinage formalized by the Edict of Pîtres in 864 — Charles the Bald's sweeping monetary reform that suppressed unauthorized mints, standardized the denier, and concentrated production at crown-controlled sites. The edict is one of the most consequential monetary interventions of the early medieval West, and this issue dates directly from its implementation.

The Château-Porcien output was modest, and survivors are thinly distributed across major collections.