CNN.com: Building’s connected to Rome’s ancient Mediterranean port " Portus” have been discovered after being buried for 1800 years.Embedded video from CNN VideoThe site consists of an amphitheater, a Roman warehouse and the ruins of an Imperial palace by University of Southampton archaeologists owes much to modern technology."It’s true I think also to say that we have kind of rediscovered it because the great Italian archaeologist Rodolfo Lanciani reported the discovery of a theater in the 1860s but nobody could actually find it,” said Simon Keay, a leading expert on Roman Archaeology to CNN.The site is less than a mile from Rome’s Fumicino International Airport, and was discovered using modern sensors, ground-penetrating radar and probes to compile a digital underground map of the area."So we then played around with it on the computer screen, we did a virtual reconstruction of it and amphitheater shape grew out of the screen and we knew that we were on to something very special,” said Keay.