Insula of the Ara Coeli
The Insula of the Ara Coeli is one of the best-preserved examples of a Roman insula — a multi-storey residential apartment block — surviving in Rome, located at the foot of the Capitoline Hill adjacent to the Piazza d’Aracoeli at 41.8941° N, 12.4823° E. Dating to the 2nd–3rd century AD, the structure originally rose to five or six storeys and housed scores of middle- and lower-class Romans above ground-floor commercial tabernae, illustrating the dense urban residential fabric that characterised imperial Rome outside its monumental civic spaces. Several upper floors remain standing to a significant height, making this insula an unusually legible ruin in an area otherwise dominated by medieval and Renaissance construction.
At a glance
- Type
- Roman insula (multi-storey apartment block)
- Period
- 2nd–3rd century AD (Imperial Roman)
- Style
- Roman brick and opus mixtum construction
- Location
- Piazza d’Aracoeli, Campidoglio, Rome · 41.8941° N, 12.4823° E
Overview
Roman insulae were the dominant housing type for the vast majority of Rome’s estimated 800,000–1,000,000 inhabitants during the Imperial period. Unlike the single-family domus of the wealthy, insulae were mixed-use buildings with shops at street level and residential floors above, housing multiple families across five to eight storeys. The Ara Coeli insula survives to an exceptional height, allowing visitors and scholars to read clearly how such blocks were organised and experienced by their occupants.
History
The insula was constructed during the height of Rome’s urban building boom, probably in the 2nd century AD when the city’s population and prosperity were at their peak. It was built using fired brick — opus latericium — and Roman concrete, the combination that allowed Roman builders to raise residential structures safely to considerable heights despite Augustus’s height restrictions of approximately 21 metres. The building was progressively buried by the rising ground level of the medieval Capitoline Hill area and was partially excavated and consolidated in the 20th century to its current exposed state.
What you see
The surviving fabric shows several storeys of brick-faced walls pierced by regular windows and doorways that once accessed individual apartments. The ground floor preserves the arched openings of tabernae — commercial units that would have housed small workshops or shops facing the street. The upper levels display the progression from larger, more comfortable apartments on the lower floors to smaller, less desirable rooms higher up — a social stratification encoded in the very architecture of the building. The insula stands in dramatic contrast to the medieval Aracoeli staircase and the Capitoline Hill immediately behind it.
Cultural significance
The Insula of the Ara Coeli is one of the most accessible surviving demonstrations of how the majority of ancient Romans actually lived — in rented multi-family buildings rather than palatial houses — making it an invaluable complement to the grand public monuments of the Roman Forum and Palatine that dominate popular understanding of ancient Rome.
Practical information
- Address
- Piazza d’Aracoeli, 00186 Roma RM (at the base of the Capitoline Hill)
- Hours
- Exterior visible at all times; check with the Sovrintendenza Capitolina for interior access
- Admission
- Exterior free; check for guided access arrangements
Getting there
The insula is located at the foot of the Capitoline Hill, steps from the Vittoriano monument (Altare della Patria) on Piazza Venezia. It is a 10-minute walk from Largo di Torre Argentina. Bus lines 40, 44, 46, 60, 62, 63, 64, 70, 85, and 87 stop at Piazza Venezia. The nearest Metro station is Colosseo (Line B), approximately 15 minutes on foot through the Forum area.