With the discovery of a large quantities of fired clay weights on the La Tène (Celtic) and Gallo-Roman site of “Les Trois Mares” in Palaiseau (Essonne), the question of weaving techniques in use between the end of Gallic independence and the first years of romanization can be addressed.

Triangular weights with three perforations are well attested in the Gallic period, especially in the north of Gaul, and seem to have been used after the conquest. Their state of preservation made it possible to observe consecutive traces of wear due to the movement of a fastener through the perforations and thus to identify their mode of suspension : point downwards. This simple solution is coherent with the characteristics of the weights. Experimental tests were undertaken and the results seem conclusive.