The ancient city of Arles, once a major commercial hub in the Roman Empire, still holds many secrets. Some of them are buried in the bed of the Rhône. Little by little, working in complete darkness, archaeologists and scuba divers are braving its treacherous currents to uncover the remains of a mysterious Roman shipwreck and its cargo. For fear of looters, they work in total secrecy. Their investigations lead us to the 4th century AD – the golden age of the city of Arles and a time of great upheaval in the Roman Empire. During this period, the Empire switched...