The Middle Ages
After the barbarian invasions cut the aqueducts, the rapidly dwindling population abandoned the surrounding hills and concentrated in the Campus Martius, depending on the Tiber for water, but subject to its flooding. Since it was next to the river and next to the Vatican, the area became the most populous part of Rome in the Middle Ages. The river supported a thriving economy and a supply of water, and the continuous stream of pilgrims to the city brought wealth to the area.
The main road connecting Rome to the rest of Europe was the Via Cassia, entering Rome through the Porta del Popolo ("door of the people") in the northern part of the Campus Martius. Via Cassia became the most important road in medieval times, because it connected Rome with Viterbo, Sienna, and Florence.
The other main road to Rome, the Via Aurelia, became unsafe in medieval times with the spread of malaria, because it passed through the unhealthy marshes near several coastal lakes in the Maremma lowlands (as Orbetello lagoon, Capalbio lake, and other Tombolos), and because its route by the sea made it more susceptible to attack from raiders. The coastal towns around Via Aurelia were areas subjected to women kidnapping and plunder made by Muslim Saracen pirates.
Because of the increasing importance of the area, several popes decided to improve its conditions. In the period 1513-1521, Pope Leo X built a route connecting Porta del Popolo to the Vatican. This road was first called the Via Leonina after the pope, later the more famous Via di Ripetta after the name of the river port. To improve the hygiene of the area, several ancient Roman aqueducts were restored to operating condition.
As the population of Rome greatly increased in the Middle Ages, the Campus Martius became a crowded multi-cultural place where many foreigners settled. In 1555, Pope Paul IV designated part of the southern part of the Campus Martius as the ghetto to contain the city's Jewish population.
Read more about this topic: Campus Martius
Famous quotes related to the middle ages:
“Until the end of the Middle Ages, and in many cases afterwards too, in order to obtain initiation in a trade of any sort whatever—whether that of courtier, soldier, administrator, merchant or workman—a boy did not amass the knowledge necessary to ply that trade before entering it, but threw himself into it; he then acquired the necessary knowledge.”
—Philippe Ariés (20th century)