This work addresses the question of the early use by ancient societies of northern France of coal in crafts and more particularly iron metallurgy. Preventive archeology operations since the 2010s in this territory have shed light on such practices. The oldest regional traces found date from the end of the 2nd and the beginning of the 3rd century. However, it was mainly throughout the Middle Ages that this practice expanded. The issues that arose from these discoveries resulted in a thesis ...