Mapping the Imperial City
An exploration of the fourteen administrative regions established by Augustus, defining the urban landscape of ancient Rome.
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The Augustan Reorganization
A New Administrative Framework
In 7 BC, Emperor Augustus fundamentally restructured the urban administration of Rome by dividing the city into 14 distinct administrative regions. This comprehensive reorganization superseded the four traditional regions, or "quarters," that were historically attributed to the sixth king of Rome, Servius Tullius. These new regions, designated in Latin as regiones (singular regio), were further subdivided into official neighborhoods known as vici. Over time, each regio acquired unique nicknames, often derived from prominent landmarks or significant topographical features within its boundaries.
Imperial Influence
The Augustan model of regional division proved influential, serving as a precedent for later administrative structures. Notably, after the reign of Constantine the Great, the imperial capital of Constantinople was also organized into fourteen regiones, mirroring the Roman example. This demonstrates the enduring impact of Augustus's urban planning on the administration of major cities within the Roman sphere of influence.
Evolution of Roman Regions
Pre-Augustan Divisions
Evidence for distinct regional divisions in Rome prior to Augustus's reign is somewhat limited. However, writings from the mid-40s BC by Marcus Terentius Varro describe four primary divisions of the city, referred to as 'partes urbis'. Varro individually names these as regiones: I Suburana, II Esquilina, III Collina, and IV Palatina. Varro also provides insights into the existence of vici during the Republican era, suggesting they were analogous to modern neighborhoods, derived from the Latin word via (road).
Augustan Reforms
By the time of Augustus, the local shrines within the vici had fallen into neglect. Augustus initiated a series of reforms, beginning around 12 BC with the restoration of individual vicus shrines. This culminated in a comprehensive reorganization in 7 BC, which included codifying the rights and duties of the vicomagistri (local officials of the vici). It was during this period that the city was officially restructured into the fourteen Augustan regiones, each placed under the oversight of senatorial magistrates.
The Fourteen Regions
Regio I Porta Capena
Regio I derived its name from the Porta Capena ("Gate to Capua"), a gate in the Servian Wall through which the Appian Way entered the city. This region extended south of the Caelian Hill to the line of the later Aurelian Walls.
Regio II Caelimontium
Regio II encompassed the prominent Caelian Hill, a significant elevation within the city's topography.
Regio III Isis et Serapis
This region was named after the sanctuary dedicated to Isis. It included the valley destined to become the site of the Colosseum, along with portions of the Oppian and Esquiline hills.
Regio IV Templum Pacis
Named for the Temple of Peace, constructed by Vespasian, this region comprised the valley between the Esquiline and Viminal hills, the bustling area of the Subura, and the Velian Hill.
Regio V Esquiliae
The name of Regio V originates from the Esquiline Hill. It included parts of the Oppian and Cispian hills, as well as the plain situated just outside the Servian Wall.
Regio VI Alta Semita
Regio VI took its name from the Alta Semita ("High Path"), a street traversing the Quirinal Hill. This extensive region also covered the Viminal Hill, lower slopes of the Pincian Hill, and the intervening valleys. Major landmarks included the Baths of Diocletian and the Castra Praetoria.
Regio VII Via Lata
This region was named after the Via Lata ("Wide Street"), a broad urban thoroughfare corresponding to the modern Via del Corso. It encompassed parts of the Campus Martius east of this street and the Pincian Hill.
Regio VIII Forum Romanum
The central region included the Capitoline Hill, the valley containing the Forum Romanum, and the area extending towards the Arch of Titus and the Temple of Venus and Roma.
Regio IX Circus Flaminius
Named for the Circus Flaminius in the southern Campus Martius, this region included a significant portion of the Campus Martius west of the Via Lata.
Regio X Palatium
Regio X was named after the Palatine Hill, the legendary founding site of Rome and the location of imperial residences.
Regio XI Circus Maximus
This region took its name from the Circus Maximus, situated in the valley between the Palatine and Aventine hills. It also encompassed the Velabrum and areas near the Forum Boarium and Forum Holitorium.
Regio XII Piscina Publica
Regio XII was named after the Piscina Publica, a public bath complex that disappeared during the Imperial period. It included the high ground near the church of San Saba and extended towards the Appian Way, site of the Baths of Caracalla.
Regio XIII Aventinus
Regio XIII comprised the Aventine Hill and the adjacent plain along the Tiber River, which housed the city's main port, the Emporium.
Regio XIV Transtiberim
Known as the region "across the Tiber," Regio XIV included Tiber Island and all areas of Rome situated west of the Tiber River, corresponding to modern Trastevere.
Further Context
See Also
For a deeper understanding of Rome's urban structure, consult resources on the topography of ancient Rome.
Notes
The descriptions of the regions are based on historical accounts and archaeological evidence, providing a glimpse into the organization of the ancient city.
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References
References
- Lawrence Richardson, A New Topographical Dictionary of Ancient Rome (Johns Hopkins University Press, 1992), p. 6.
- Peter Lampe, Christians at Rome in the First Two Centuries (Continuum, 2003), p. 42 online.
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