Ager Vaticanus

Origin of the name

About the etymology of Vātī̆cānus there are several hypotheses: according to Barthold Georg Niebuhr, the toponym perhaps refers to an archaic Etruscan settlement called Vaticum; Varro derives the name from a childbirth deity named Vaticanus or Vagitanus, the god of the vagiti ("wailings"), since va was supposed to be the first syllable pronounced by a child; Aulus Gellius on his part derives the name from vāticinium, a prophecy elicited by the flight of the birds or from the study of the liver of the victims of sacrifices and inspired by the god who controlled the area: the science of the Vaticini, the aruspicina or Etrusca Disciplina, had been introduced in Rome by the Etruscans. This term was ultimately derived from vātēs ("soothsayer, prophet") and canō ("to sing").

History

During the first centuries of Rome, the Ager Vaticanus was the boundary between Rome and the powerful Etruscan city of Veii. After the Roman conquest of the rival city in 396 BC, the Centuriate Assembly kept the tradition of raising an ensign on the summit of the Janiculum hill, to signal a possible Etruscan raid. The hill was known as Antipolis ("anti-city" in Greek), in contrast with the Capitoline Hill.

By the laws of the Duodecim Tabulae, particularly Table III, insolvent debtors could be sold into slavery, but only on the right bank of the Tiber. After Cincinnatus paid a large punitive fine for his son, it was recorded that he retired "like an exiled man" to his property in the Ager Vaticanus, although the plain was already Roman territory.

The toponym Ager Vaticanus is attested until the 1st century AD: afterwards, another toponym appeared, Vaticanus, denoting an area much more restricted: the Vatican Hill, today's St. Peter's Square, and possibly today's Via della Conciliazione.

Horti

The Ager Vaticanus lowland was exposed to the periodic floods of the Tiber, hosted vegetable gardens and vineyards, and was known for its unhealthy climate and bad wine until the end of the first century BC, when the development of local roads along the Via Cornelia (towards the port of Caere), the via Triumphalis towards Veii and the via Aurelia nova made possible for the families of the aristocracy the construction of luxurious private suburban residences (Horti).

Excavations carried out in various periods in the area that stretches from Santo Spirito in Sassia to the Palazzaccio have brought to light traces of 1st and 2nd century buildings, pertinent to the Horti Agrippinae ("Agrippina's gardens"), belonging to Agrippina the Elder, wife of Germanicus. After her death, the Horti passed to her son Caligula, who had a hippodrome built there (the Circus Gaianus). To mark its spina, Caligula erected in the circus an Egyptian obelisk (the only one always standing, among the numerous obelisks in Rome); it was later moved in 1586 by Pope Sixtus V (r. 1590–95) to St. Peter's Square.

The circus and the Horti were inherited by Nero, who used both to lodge the Romans damaged by the great fire of 64, and to carry out the executions of the Christians accused of the fire itself. Because of that, until the end of the Middle Ages the popular name of the area beyond the Tiber north of Trastevere remained Prata Neronis ("Nero's meadows").

The neighboring Horti Domitiae ("Domitia's gardens"), owned either by Domitian's wife, Domitia Longina, or by Nero's aunt, Domitia Lepida the Younger, also flowed into the imperial property; in this area Hadrian (r. 117–138) let later build his Mausoleum. Further away from the river, Trajan had a Naumachia built, a facility intended to host naval battles.

Roads

The Ager Vaticanus was serviced by two roads: the via Triumphalis and the via Cornelia. Both roads are well known from the ancient authors, but their real paths are unknown. There is consensus that the former, so called because of the triumphs of the Roman armies coming back from Veii, started in the Campus Martius, crossed the Tiber on the Pons Neronianus, heading north in direction Monte Mario and then flowing into the via Cassia; About the Cornelia's path there are several hypotheses: until the 1940s was a common opinion that the road branched from the Triumphalis at a short distance from the bridge of Nero, running in east-west direction. According to this hypothesis, the Christians condemned to death by Nero would have walked across this road while going to their martyrdom in the Circus of the emperor. However, since during the excavations in Borgo during the 1940s for the building of Via della Conciliazione no sign of the road was found, now many scholars think that the via Cornelia started from Ponte Milvio and – running along the right bank of the Tiber – reached Hadrian's Mausoleum crossing the via Triumphalis in a place corresponding to the destroyed Piazza Scossacavalli in Borgo.

A third road, the via Aurelia nova, started from the Pons Aelius running southwest until today's Porta San Pancrazio.