Scholars discovered the 100-yard-wide (90-metre-wide) canal at Portus, the ancient maritime port through which goods from all over the Empire were shipped to Rome for more than 400 years. The archaeologists... believe the canal connected Portus, on the coast at the mouth of the Tiber, with the nearby river port of Ostia, two miles away. It would have enabled cargo to be transferred from big ocean-going ships to smaller river vessels and taken up the River Tiber to the docks and warehouses of the imperial capital. Until now, it was thought that goods took a more circuitous overland route along...
