Denier - Charlemagne Aachen mint

Before Charlemagne's monetary reform of circa 793–794, his deniers were struck on the older Merovingian weight standard — roughly half what the reformed coinage would demand. This piece predates that overhaul, which unified the Carolingian monetary system around a heavier silver penny tied to the new libra pondo of 408 grams. The reform was so thorough it effectively made earlier issues obsolete, driving them out of circulation and into hoards, which is the primary reason survivorship of pre-reform Aachen deniers remains genuinely sparse.

Aachen was still consolidating its role as an administrative center during this window; the mint's output reflected political ambition as much as economic need.