Light argenteus at christogram - Childebert I Marseille mint

Childebert I ruled the kingdom of Paris — the portion of the Frankish realm he inherited after Clovis's death in 511 divided the territory among four sons. His reign of nearly five decades saw sustained Merovingian pressure into Burgundy and Visigothic Septimania, and Marseille, as the principal Mediterranean port still functioning under late Roman commercial infrastructure, retained unusual monetary importance. The mint there continued producing lightweight silver fractions long after such issues had largely ceased elsewhere in Frankish Gaul.

The christogram placement on this issue reflects the explicit Nicene Christian identity the Merovingian dynasty cultivated following Clovis's baptism — a political as much as theological choice that differentiated Frankish coinage from Arian Visigothic issues to the south.