Why Was the Colosseum Built on This Site?
The Colosseum sits on the drained bed of an artificial lake that once formed the ornamental centre of Emperor Nero’s Domus Aurea — his Golden House, a palace complex so vast it occupied much of central Rome after the Great Fire of AD 64. When Vespasian became emperor in AD 69, he chose to build the amphitheatre precisely on this spot as deliberate political propaganda: Nero had taken land from the Roman people for his private pleasure; the new Flavian dynasty would return it to the people as a public entertainment venue. The site choice is inseparable from the political message it carried.
Location Quick Facts
- Previous use: ornamental lake (stagnum) of Nero’s Domus Aurea
- Lake created: AD 64–68, under Nero
- Lake drained: AD 70–72, under Vespasian
- Colosseum foundations built on: compacted lake bed with reinforced drainage
- Original amphitheatre name: Amphitheatrum Flavium (Flavian Amphitheatre)
- Nickname origin: Colossus of Nero statue, relocated nearby by Hadrian
- Domus Aurea survival: partially preserved underground, accessible on guided tours
What Was the Domus Aurea?
The Domus Aurea, or Golden House, was the private palace complex Emperor Nero began constructing in AD 64, immediately after the Great Fire of Rome. The fire — which burned for nine days and destroyed substantial portions of the city — cleared enormous tracts of central Rome, and Nero used the opportunity to appropriate roughly 100 hectares of prime land for a vast landscape palace complex covering the Palatine, Esquiline and Caelian hills.
The Domus Aurea was not a single building but an integrated landscape. It included pavilions, banqueting halls, bath complexes, vineyards, woodland, pasture for grazing animals, and — at its centre — an ornamental lake (stagnum) surrounded by colonnades and pleasure gardens. Contemporary sources describe the complex as more a country estate embedded in the city than a conventional palace. The architect Celer and the painter Fabullus led the decoration; the surviving frescoes, rediscovered during the Renaissance, influenced European decorative art for centuries.
Nero’s appropriation of so much central urban land was politically catastrophic. Later sources — particularly Suetonius and Tacitus — record Roman resentment at the scale of the confiscations. Nero himself allegedly remarked on moving into the complex: “At last I can begin to live like a human being”. Whether historical or invented, the quotation captures the perception that he had taken the city for himself.
How Did Nero Build the Lake?
The artificial lake — the stagnum Neronis — occupied the low valley between the Palatine, Esquiline and Caelian hills, where the fire had cleared the dense urban fabric. Natural springs and runoff fed into the basin, supplemented by supply from one of Rome’s aqueducts. The valley floor was engineered to retain water, with ornamental colonnades and promenades laid out around the shores.
Surviving accounts describe the lake as populated with boats for floating banquets, surrounded by “buildings like cities” and beyond them fields, woods and vineyards. Whether accurate or exaggerated, the descriptions evoke a scale of private luxury unprecedented in Rome and deliberately remembered as emblematic of Nero’s excess.
What Happened After Nero’s Death?
Nero died by suicide in AD 68, hunted by his own former officers during the rebellion that ended his reign. The Year of the Four Emperors followed — a chaotic succession of Galba, Otho and Vitellius, each briefly claiming power before being killed. Vespasian emerged as the eventual victor and was confirmed as emperor by the Senate in late AD 69.
Vespasian inherited a city whose population deeply resented Nero’s appropriation of central urban land. He also inherited an empty treasury and a legitimacy problem: the Flavians were a provincial family with no dynastic connection to the Julio-Claudians. Returning Nero’s confiscations to public use addressed both the political and the symbolic dimensions of the problem.
The Domus Aurea was systematically dismantled and repurposed. The lake was drained and its bed became the foundation site for the Colosseum. Titus built public baths over the eastern wings of the complex. Trajan, a generation later, built his own baths over the rest. The Flavian and Trajanic programme gradually buried the Golden House, preserving substantial portions underground while visibly replacing them at surface level.
How Did Vespasian Drain the Lake?
Draining the stagnum involved diverting the inflow, pumping out the standing water, and engineering a stable foundation bed capable of supporting a building weighing tens of thousands of tonnes. Roman engineers achieved this through a combination of massive drainage channels — portions of which remain visible today beneath the Colosseum — and progressive compaction of the lake bed with rubble, concrete and layered masonry.
The Colosseum’s foundations are exceptionally deep as a result: the concrete raft extends 12 to 13 metres below ground level, forming a ring structure under the perimeter walls. This depth was necessary both to reach stable subsoil and to manage the continued presence of groundwater, which still flows through the ancient drainage system and remains a conservation concern today.
What Symbolic Point Did the Location Make?
The message was impossible to miss. Where Nero’s private lake had once shimmered for the enjoyment of a single man and his court, a public amphitheatre now rose for the entertainment of the Roman people. Where one emperor had taken, a new dynasty was seen to give. The choice of site was as important as the choice to build, and Roman political communication made full use of the contrast.
Contemporary literature preserves the message clearly. The poet Martial, writing around the time of the Colosseum’s inauguration, composed a collection called the Liber de Spectaculis (Book of the Spectacles) celebrating the games. Its opening poems explicitly contrast the new amphitheatre with Nero’s Golden House: where once there was the hateful palace of a tyrant, Martial writes, there now stands the amphitheatre of all people.
Why Is It Called the Colosseum and Not the Flavian Amphitheatre?
The building’s original and official name was the Amphitheatrum Flavium — the Flavian Amphitheatre — after the dynasty of Vespasian, Titus and Domitian who built it. The name “Colosseum” derives from a separate monument: the Colossus of Nero, a 30-metre bronze statue originally erected by Nero in the vestibule of his Domus Aurea.
After Nero’s death, the statue was not destroyed. Its face was recut to represent the sun god Sol, and around AD 128 Emperor Hadrian moved it to a position beside the Flavian Amphitheatre. Standing beside the enormous amphitheatre, the giant bronze statue gave the building its popular nickname: the building next to the colossus. Over the medieval period this shortened to “Colosseum” and eventually displaced the original name entirely.
The statue itself disappeared during late antiquity, probably melted down for its bronze. Its foundation pedestal is marked out in the paving beside the Arch of Constantine and is visible today to anyone who looks for it.
Can You Visit the Domus Aurea Today?
Yes. Substantial portions of the Domus Aurea survive underground, buried and thus preserved when the Flavians and Trajan built over the complex. The surviving rooms include frescoed reception halls and corridors that remained sealed for over a thousand years before Renaissance artists — including Raphael and Ghirlandaio — rediscovered them by lowering themselves through holes in the ceiling to sketch the paintings below. Their copies influenced Renaissance art for generations, and the term “grotesque” decoration comes directly from this experience of the grotte (caves) where the paintings were found.
Access today is by guided tour only, with strict timed slots and limited group sizes. The Domus Aurea is a separate ticket from the Colosseum and requires its own booking. Many tour operators offer combined Domus Aurea + Colosseum packages.
Frequently Asked Questions
Is the Colosseum really built on a lake?
Yes. The Colosseum sits on the drained bed of the artificial lake that formed the ornamental centre of Nero’s Domus Aurea. Massive drainage works and deep foundations were required to stabilise the site for construction.
What was on the site before the Colosseum?
Before AD 64, ordinary urban Rome — houses, shops, workshops. The Great Fire of AD 64 cleared the area, and Nero appropriated it for his Domus Aurea, within which the future Colosseum site became an ornamental lake. The lake existed from roughly AD 64 to AD 70, when Vespasian drained it for construction.
Why did the Flavians choose this exact spot?
Political symbolism. Building on Nero’s confiscated land — and on the most ostentatious feature of his palace, the lake — demonstrated that the new dynasty was returning public space to public use. The contrast with Nero was deliberate and contemporary writers understood it immediately.
Was Nero’s Colossus destroyed when the Colosseum was built?
No. The statue survived Nero’s death, was rededicated to the sun god Sol, and was later moved beside the Flavian Amphitheatre by Hadrian around AD 128. The amphitheatre acquired the nickname “Colosseum” because of the giant statue standing beside it. The statue itself disappeared during late antiquity.
Why is the Domus Aurea partly preserved?
Because the Flavians and Trajan built over it rather than demolishing it entirely. The lower floors of Nero’s palace were buried beneath Trajan’s Baths and other construction, and this burial preserved the frescoes that Renaissance artists rediscovered a thousand years later.
See the Site’s Layered History on a Guided Tour
Our Colosseum tours include discussion of the Domus Aurea context and the political meaning of the site choice — without it, the amphitheatre is just a building, and with it, the amphitheatre becomes a readable statement in stone. Combined Colosseum and Domus Aurea packages are available for visitors who want to see both sides of the story underground and above.