Most of the large cities of France were of a Roman background.  The only large city in France that is not from the Roman background is Montpellier.  People from all over went there to trade goods and services since it was considered the trading center all around the Mediterranean world during the 10th century.  It was such a popular place that everyone of every religion traded there.  This French city has a rich history which makes it popular today for tourists from all over the globe.  People go to see the sites like the only two existing towers from the walls that were built back in Medieval days.  I hate to spoil any surprises, so you can get more information on this fabulous city online.