 But the distances given in the Itinerary of 9 M.P.from Alsium, and the same from Portus Augusti at the mouth of the Tiber, enable us to fix its position with certainty at a spot now called "Fregene" in the "comune" of Fiumicino.The modern town was created in 1928 as part of a large drainage project along the coasts of Lazio, near , to create a sea resort.