Possible Roman Imperial shipyard discovered in Italy

Experts have discovered a huge building near the center of the complex at the ancient port of Rome which they believe was used for the maintenance of ships. If correct, the building would be part of the Roman Imperial shipyard, the "largest of its kind in Italy or the Mediterranean."

The 2nd century building is the size of a soccer field, and contains concrete pillars supporting "at least eight parallel bays with wooden roofs."