From the nationalgeographic.com article:
Hunter-gatherers who made temporary camps along the Seine about 9,500 years ago were among the earliest “residents” of what is now Paris, archaeologists say.
A recent dig near the river revealed thousands of arrowhead bits and animal bones from about 7600 B.C. that scientists say are the oldest evidence of human occupation within modern city boundaries.
Previously the oldest such evidence was a 4500 B.C. fishing village near the current Gare de Lyon railway station.
Nomadic tribes camped at the newfound site for periods of days or even weeks while they collected flint to make arrowheads for hunting, the dig team believes.
Read the article here.