 The helpers and landing along the Lytus importusum, dangerous cost, are Santa Severa, Civitas Vertula and Corneto. The Mediterranean coastline between Santa Severa and Corneto, nearly 50 km north of Rome, isn't suitable sea shore to the ships. Infact, the whole coast of Lytium are, as some others, in particular the sea bottom isn't flat, it is often exposed to silting and erosion, legumes and marshes are the main feature of most areas along the coastal plain. Historically Sarcer, medieval pilot book or travel chronicles, describe this natural environment, confirm the label of Lytus importusum, dangerous cost, used by prime the younger to describe it in the 2nd century AD. For instance, the Corneto's Arbor accessibility is highly representative. Its intent activity is well known throughout the Middle Age. The medieval town landings were located in the nearby rivers mounds. They used to be affected by silting, especially in summer. David Abulathia proposed that they tried to bypass this old by docking all the ships in the small bay of Santa Marina facing Santa Marinella Tower, now the little village of Santa Marinella. But like the most part of bay or in the surroundings, this one used to be quite small. Two 17th century pilot books written by Giacomo Galletti and Bartolomeo Cascensi advise us that Amiglia II is a tower in Santa Marinella, where two or three galleys would be saved. Two miles away there is the tower of Santa Marinella, where you can store two or three galleys. And in the face of the capo, via Santa Marinella, over a little distance from the base, after the Capolinaro, you can find Santa Marinella, where there is a small place to land. Coastal erosion due both to natural and human activities affected the shaping of the shoreline, so possibly not to landings of this region. This phenomenon is particularly clear at Capolinaro Bay, along the coastline, in front of the Roman colony of Castrum Novum. Here, ancient buildings being studied by Gregorpo Cardi, University of Lille, are visible along more than 200 meters long strip of coast. According to a research undergone by Fabrizio Antonioli, Kurt Lambeck and Marko Ansidei, during the last 2,000 years, erosion and consequently the sea level rise used to reach the rate of two, eight and seven centimeters per century, with a marked increase during the 18th century, about 20 centimeters, due to the increase of the ocean's temperature and earth's atmosphere. Marshes are often considered within the 19th century sources, focused mainly, so not only on malaria. Rutilius Namazianus already describes Mignones month and Graviska's Arbor as area infested by exhalations. The author was a cathos text preserved through a service account that suggests the name Graviskae could come from the unhealthy environment of the surroundings. In the 14th century, Giovanni Villani points out to many people who are nowadays wore out due to the unhealthy air, when he describes the process that made this area deserted in the 19th century. Concerning with the, we must quote the AD 1842 Shah, the year passage, the only building of these sad hires are wash towers built from place to place to defend the coast, soldiers here deployed do not need to defend themselves from privates or smugglers, but from the malaria. The few inhabitant obliged by necessity to live here, postilius workers are all stroked by the plague. During the middle age, the presence of marshes led to a partial abandonment of the coastal route to Rome, consented on via Aurelia. The road is seldom mentioned as the case, as in the case of the privilege to Pope Benedict VIII in a tour report by James II, the just, in some pilgrims' diaries who came to Rome for the jubilee of 1400 and 1500. Despite this, some relevant harbor used to be active in this region and along the Litus in Portosum during the middle age. Among them, that of the Etruscan town of Caere, the harbor of Pirgi that corresponded to the medieval harbor of Santa Celera, the Roman harbor of Centum Cellae, now Cittarecchia, and the medieval harbor of Civitas Vettula and Corneto, the former enraised the functions of Centum Cellae. A major change in the trading development of the region was promoted by Cayenne. In the second century AD, the emperor promoted the main of the harbor of Centum Cellae aiming to enraise the landing network to supply Rome. The description of the words is recorded by Plinus Younger in a famous letter to Cornelianus. In fact, he writes that yam per longissimum spazium litus importosum oc receptapulo utetus. Apollodorus of Damascus is presumed to be the architect of this work. It consists of a dock and two piers of a different shape. The first one was a half-circle structure of the west side to prevent that the main streams could affect the ships. The second one, positioned in the eastern side, less affected by the stream, was more slight. Each of them had a lighthouse while a two-towered floor wall was positioned before them. According to the comparari viewers, Quentum Cellae should like an architectural achievement. It was so impressive that still in the 19th century a pilot book described it as the most beautiful and best-made house. It is a collection in Castrum Novum, the Roman colony, whose more ancient land it used to be the north of Capolinaro Bay, show that a balneum was built right in this period on the landing site. The town was embellished with an odeion whose chronology is ensured by the stamped bricks used to build it. The balneum and the odeion witnessed that Trian's harbour did not lead to the abandonment of former landings. On the contrary, it favoured their increasing activity. The harbour's network, reshaped by Trian, along with Elytus in Portuosum, hardly survived during the early Middle Ages due to the Saracen rise on the Tyranian coast. They recovered during the Middle Ages. In fact, since the 12th century, another Lashium coast used to be within a large trading network. Spanning from Sicily to Liguria and the Easter coast of Sardinia and Corsica. According to Luciano Palermo, the route trip of 14th century Galea to Naples, quote by Muratori, provide a clear description of the most popular route of the period. The ship was loaded with French tissues at Avignon and Marseille to live directed to Monaco, Genua, Pisa, Pionbino and Civitavecchia. The harbour of Civitavecchia, former centum Calea and Santa Severa, the Traskan harbour of Piergi that survived up in the Middle Ages, still used the Roman docks, while the harbour of Corneto is a network of landings along the river mouse. The main good trading with the ship also was mailing crops cultivated in the surrounding valleys and addressed to the markets of Rome and Genua. There it used to be exchanged with tissues, pottery, leather and salon slaves. In Tarquina Corneto one can find some storage pit for crops cultivated in the valley of the region. It used to be a two-step storage process. During the first one the crop was stored in the pits near the field where it used to be cultivated. Then it was moved to the pits near the markets, waiting to be uploaded into the ships. Relevant expenses were made to buy or to rent pits, and those related to the personnel involved in controlling the staff and granting a good ventilation. The finds of Corneto excavation prove a changes made with Tuscany and Liguria, witnessed by coins, and with Sardinia. From here Corneto received a large quantity of pottery in Sparomoresca. The ship sailing along this route used to carry out the capability where we could find many arbos as well as a series of approaching areas. The pilot book of Angelo Custabuti is one of the main texts to locate the approaching areas. At the beginning of the 18th century the author mentioned 16 bay where the ship could be approached among the three arbos of Santa Severa, Civita, Vecchia and Corneto. Recent archaeological investigation prove that these plies have been chosen according to the geographical setting of the Litus in Portoso. In fact they are located near the rivers, mountains, especially in areas protected by the wind. Most of the land mentioned by Custabuti used to be active during the middle age, and they overlaid some Roman posiciones and staziones located in the Itinerarium Maritimum in the 4th century A.D. To finish, the geographical setting of the strip of coast shows a series of physical arduous coastal areas. But these areas were covered in the northern and northern sea bed, with the risk of flooding and ladders. However, it did not prevent the making of a multi-factor landscape characterized by the self-work and cultivated fields whose product used to fill the cargo halls. Since the time of Tribal Triumph this area was mentioned as not really suitable for ship landing. but it was enclobbed in a large network of Mediterranean trace who's peak was reached during the 15th century after the discovery of Alanians. I cut.