Red earthenware reinforcement, triangular with round head and hole, net reinforcement weighting soil find ceramic earthenware, hole, hand-formed baked Hand-shaped tapered earthenware with round hole. Glaze specks Two pieces with shrinkage cracks occur during the drying of the earthenware archeology underground pit Rotterdam City Triangle Groenendaal indigenous pottery catch fish fisherman blessing stone Soil discovery: around big cesspool underground pit Groenendaal at ca. 60 meters approx. 2.5 meters - N..P. (September 15, 1975).