Therefore Ostia is today still lying next to the Tiber, but at a distance of some three kilometers from the beach.Ostia is Latin for "mouth", the mouth of the Tiber.Back to index The old road running from the north-west (mouth of the river Tiber) to the south-east.
On the plan it is also called Via Laurentina, a road leading to the south-east to the village Laurentum. The rectangle is a military fortress that was built later, probably in the early third century (see below). The oldest settlement that has been found is the so-called Castrum.
To the south of the fortress the old road continues ("southern stretch of the Cardo"). It was a rectangular, military fortress (194 x 125.7 metres), with walls of large tufa blocks.
The hypothesis is that, at the time, it was only an outpost.
- The cuspate delta advanced seaward very quickly, at an estimated progradation rate of 5-6 metres per year, so that by the fifth to fourth century BC it was almost fully developed.
The ancient Roman city of Ostia was in antiquity situated at the mouth of the river Tiber, some 30 kilometres to the west of Rome.