Overlooking the Mediterranean Sea, a French port city stands on the grounds of Roman history.The site of the first Roman colony outside of Italy, Narbonne holds the secrets to the empire's past — and what it did with its stuff.During an excavation along the outskirts of the city, archaeologists discovered stone walls more than 2,000 years old, likely part of an ancient warehouse district, according to a March 22 news release from INRAP, the French National Institute for Preventive Archaeological Research.The city, called Colonia Narbo Martius, was founded in 118 B.C. during the early expansion of the Roman Empire, the...