The ''Ager Romanus'' (literally, "the field of Rome"') is the geographical rural area (part plains, part hilly) that surrounds the city of

Rome Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...

. Politically and historically, it has represented the area of influence of Rome's municipal government. It is limited to the south by the

Monti Prenestini The Monti Prenestini is a mountain range in the Lazio sub-Apennines, in central Italy to the east of Rome. It is of limestone formation. It is bounded by the Monti Tiburtini to the north, by the Monti Ruffi to the east, and by the valley of the ...

range, Alban Hills and

Pontine Marshes 250px, Lake Fogliano, a coastal lagoon in the Pontine Plain The Pontine Marshes ( , ; , formerly also ; [] by Titus Livius, [] and [] by Pliny the Elder''Natural History'' 3.59.) is an approximately quadrangular area of former marshland ...

; to the west by the Tyrrhenian Sea; to the north by the hills surrounding Lake Bracciano and to the

east East is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth. Etymology As in other languages, the word is formed from the fact that ea ...

by the Monti Tiburtini range.

History

Ancient Rome

The Rome of

Romulus Romulus (, ) was the legendary founder and first king of Rome. Various traditions attribute the establishment of many of Rome's oldest legal, political, religious, and social institutions to Romulus and his contemporaries. Although many of th ...

and his immediate successors possessed a very restricted territory, as did neighbouring

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

cities such as Praeneste. Such territories were marked by boundary stones, or

cippi A () was a low, round, or rectangular pedestal set up by the Ancient Romans for purposes such as a milestone or a boundary post. They were also used for somewhat differing purposes by the Etruscans and Carthaginians. Roman cippi Roman cippi we ...

, used to define and limit the legitimate area of influence of cities, and the boundaries of private landholdings. According to tradition, Rome rapidly outgrew the ''ager'' established by its founder, and rather than accept its confinement,

Tullus Hostilius Tullus Hostilius (; r. 672–640 BC) was the legendary third king of Rome. He succeeded Numa Pompilius and was succeeded by Ancus Marcius. Unlike his predecessor, Tullus was known as a warlike king who, according to the Roman historian Livy, b ...

razed the Latin city of

Alba Longa Alba Longa (occasionally written Albalonga in Italian sources) was an ancient Latins (Italic tribe), Latin city in Central Italy in the vicinity of Lake Albano in the Alban Hills. The ancient Romans believed it to be the founder and head of the ...

ca. 635 BC, and incorporated its former territories within the ''ager Romanus''. With the proclamation of the

Roman Republic The Roman Republic ( ) was the era of Ancient Rome, classical Roman civilisation beginning with Overthrow of the Roman monarchy, the overthrow of the Roman Kingdom (traditionally dated to 509 BC) and ending in 27 BC with the establis ...

in 509 BC, all the territory occupied by Romans in "

Latium vetus or ' () is a region of the Italian Peninsula bounded to the north by the Tiber River, to the east by the central Apennine Mountains, to the west by the Mediterranean Sea and to the south by Monte Circeo. It was the territory of the Latins, an ...

" came to be proclaimed

ager publicus The ''ager publicus'' (; ) is the Latin name for the state land of ancient Rome. It was usually acquired via the means of expropriation from enemies of Rome. History In the earliest periods of Roman expansion in central Italy, the ''ager pub ...

, equivalent to state lands today, which were held by the state and could be granted to private citizens. The Roman municipal authorities of this era were the

consul Consul (abbrev. ''cos.''; Latin plural ''consules'') was the title of one of the two chief magistrates of the Roman Republic, and subsequently also an important title under the Roman Empire. The title was used in other European city-states thro ...

s. In effect, Rome was a gigantic city-territory continuously expanding across Europe.

Octavian Augustus Gaius Julius Caesar Augustus (born Gaius Octavius; 23 September 63 BC – 19 August AD 14), also known as Octavian (), was the founder of the Roman Empire, who reigned as the first Roman emperor from 27 BC until his death in A ...

founded the office of ''

praefectus urbi The ''praefectus urbanus'', also called ''praefectus urbi'' or urban prefect in English, was prefect of the city of Rome, and later also of Constantinople. The office originated under the Roman kings, continued during the Republic and Empire, an ...

'' and other offices which divided the administration of the city of Rome from that of the Roman Empire. Thus was solved the problem of delimiting the territory of the

municipium In ancient Rome, the Latin term (: ) referred to a town or city. Etymologically, the was a social contract among ('duty holders'), or citizens of the town. The duties () were a communal obligation assumed by the in exchange for the privileges ...

of Rome from the territory of the rest of the empire – besides the ''Regio I Latii et Campaniae'' administered by a specific governor, the confines of the municipal authority of Rome came to be fixed at the "centesimum lapidem" (i.e. one hundred miles) on each of the via consularis converging on Rome. So, ''de iure'', the Roman municipal authority controlled the whole of

Lazio Lazio ( , ; ) or Latium ( , ; from Latium, the original Latin name, ) is one of the 20 Regions of Italy, administrative regions of Italy. Situated in the Central Italy, central peninsular section of the country, it has 5,714,882 inhabitants an ...

and part of Tuscany from Talamone to Terracina and also parts of

Abruzzo Abruzzo (, ; ; , ''Abbrìzze'' or ''Abbrèzze'' ; ), historically also known as Abruzzi, is a Regions of Italy, region of Southern Italy with an area of 10,763 square km (4,156 sq mi) and a population of 1.3 million. It is divided into four ...

and

Umbria Umbria ( ; ) is a Regions of Italy, region of central Italy. It includes Lake Trasimeno and Cascata delle Marmore, Marmore Falls, and is crossed by the Tiber. It is the only landlocked region on the Italian Peninsula, Apennine Peninsula. The re ...

. The same territorial division was confirmed by the re-subdivision of the provinces by

Diocletian Diocletian ( ; ; ; 242/245 – 311/312), nicknamed Jovius, was Roman emperor from 284 until his abdication in 305. He was born Diocles to a family of low status in the Roman province of Dalmatia (Roman province), Dalmatia. As with other Illyri ...

Medieval era

After the fall of the empire, the ''

'' continued to be elected and did not come to be totally deprived of their power even by the advancing

papal The pope is the bishop of Rome and the visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the pope was the sovereign or head of sta ...

power which effectively became the municipal government of Rome. The Ager Romanus, as a political zone subject to the municipium of Rome, theoretically continued to extend ''ad centesimum lapidem'', but in practice many of its regions ended up in Lombard hands, with still others managed by the religious authorities or the pope, who were beginning to manage their territories by means of '' patrimonia'' and '' domuscultae''.

Today

The ''motu proprio'' of 6 July 1817 by

Pope Pius VII Pope Pius VII (; born Barnaba Niccolò Maria Luigi Chiaramonti; 14 August 1742 – 20 August 1823) was head of the Catholic Church from 14 March 1800 to his death in August 1823. He ruled the Papal States from June 1800 to 17 May 1809 and again ...

established the boundaries of the municipium of Rome, assigning to the capital its present communal territory as well as the present communes of Fiumicino, Pomezia and Ardea. The confines of the Comunità di Roma were thus finally defined and no longer nebulous, and these limits ended at the constitution of the commune of Pomezia (also including present-day Ardea) following its lasting foundation during the " bonifica fascista" and – in the 1990s – of Fiumicino.

References

Bibliography

* History of Lazio Topography of the ancient city of Rome {{italic title