The Colosseum, officially the Flavian Amphitheatre, is the largest amphitheatre ever built and the most visited monument in Italy, drawing approximately 15 million visitors a year to Piazza del Colosseo in the heart of ancient Rome. Built between AD 72 and AD 80 under the Flavian dynasty, it hosted gladiatorial combat, animal hunts, and public spectacles for nearly 400 years before falling into disuse and gradual decay. This guide covers what the Colosseum is, who built it, what happened inside, what the architecture achieved, and what visitors can access today.
What Is the Colosseum and Why Is It Called That?
The Colosseum takes its common name not from its size but from a statue. The Colossus of Nero, a giant bronze figure estimated at 30-35 metres tall, once stood adjacent to the amphitheatre on the grounds of Nero's private estate. Over time, the neighbourhood around the statue became known as the area of the Colossus, and the amphitheatre inherited the name. The statue itself most likely fell during the Sack of Rome in AD 410 or collapsed in a 5th century earthquake and no longer stands.
The structure's official name is the Flavian Amphitheatre, named after the Flavian imperial dynasty that commissioned and completed it. It is oval in shape, measures 188 metres long, 156 metres wide, and stands 48-50 metres tall. It was built primarily from travertine limestone, tuff (volcanic rock), Roman concrete, and brick — materials that have kept the structure standing for nearly two thousand years. It is a UNESCO World Heritage Site as part of the Historic Centre of Rome.
Who Built the Colosseum and When
Construction of the Colosseum began in AD 72 under Emperor Vespasian, the founder of the Flavian dynasty. The project was funded directly from the spoils of the Jewish War, specifically the sacking of Jerusalem in AD 70, and built on the site of an artificial lake that had formed part of Nero's vast private estate, the Domus Aurea. Reclaiming that land for a public entertainment venue was a deliberate political statement: the Flavian emperors were returning to the Roman people what Nero had taken for himself.
The workforce is estimated at 60,000 to 100,000 people, including Jewish slaves brought to Rome following the siege of Jerusalem, alongside Roman engineers, skilled craftsmen, and labourers. Vespasian did not live to see the project completed, he died in AD 79. His son Titus inaugurated the amphitheatre in AD 80 with games that lasted 100 days. Estimates suggest approximately 9,000 animals were killed during the inaugural events alone.
A third Flavian emperor, Domitian, made significant modifications after completion. He added the hypogeum, the two-storey network of underground tunnels and chambers beneath the arena floor, and constructed an additional upper tier that brought the structure to its full height. These modifications fundamentally changed how the arena operated, enabling animals and fighters to be raised directly onto the floor through trapdoors rather than entering through ground-level gates.
What Happened Inside the Colosseum
Gladiatorial Combat (Munera)
Gladiatorial combat was the centrepiece of Colosseum events from its inauguration in AD 80 until approximately AD 435. Gladiators were professional fighters: typically slaves, prisoners of war, or volunteers who had signed contracts trading their legal freedom for training, food, and the possibility of prize money. The popular image of fights ending routinely in death is not accurate. Trained gladiators represented a significant financial investment for the organisers who funded the games, and a skilled fighter who survived multiple bouts had considerable commercial value. Fights to the death occurred but were not the standard outcome.
The crowd held influence over the fate of a defeated fighter. A gladiator who fell could appeal for mercy, and the presiding magistrate or emperor, reading the crowd's response, would decide whether to spare or execute him. The specific thumb gesture associated with this decision remains debated among historians. The direction and meaning of the gesture in ancient sources is not settled.
Animal Hunts (Venationes)
Animal hunts ran from the Colosseum's inauguration until approximately AD 523, nearly a century longer than gladiatorial combat. Animals sourced from across the Roman Empire were brought to Rome for these events: lions, tigers, elephants, bears, rhinoceroses, hippopotamuses, and giraffes among them. The scale was significant: thousands of animals killed across a single multi-day event was not unusual. The ecological consequence was real. Several species were driven to regional extinction as a direct result of sustained capture and killing to supply Roman arenas, including the North African elephant and the Barbary lion.
Public Executions (Noxii)
Condemned criminals, known as noxii, were executed in the arena at midday, between the morning animal hunts and the afternoon gladiatorial bouts. Execution methods varied and were designed as public spectacle. The condemned were killed by animals, by gladiators, or by one another in staged scenarios drawn from mythology. For most spectators, the midday slot was treated as an interval rather than a main event — vendors moved through the stands and many Romans left to eat.
Naval Battles (Naumachiae)
In the earliest years of the Colosseum's operation, before the underground hypogeum was constructed, the arena floor could be flooded to stage mock naval battles known as naumachiae. Ships carrying opposing crews would fight across the flooded arena surface in front of the full crowd. Once Domitian added the hypogeum in the years following AD 80, the underground infrastructure made flooding impossible and naval battles were no longer held at the Colosseum, they moved to purpose-built venues elsewhere in Rome.
The Architecture of the Colosseum: What Makes It Remarkable
The Colosseum was not simply a large building, it was a precision crowd management system capable of filling and emptying 50,000 to 80,000 spectators in under 15 minutes. Every architectural decision served that operational goal alongside the structural and aesthetic ones.
The exterior rises across four storeys. The three lower levels each feature a continuous ring of arched openings framed by engaged columns in a different classical order: Doric on the ground floor, Ionic on the second, and Corinthian on the third. The fourth storey — the attic — replaces arched openings with flat Corinthian pilasters set between small square windows. This stacking of the three classical orders on a single facade was not structurally necessary, it was a deliberate architectural statement, a demonstration of Roman mastery over the full canon of Greek architecture.
The original exterior wall featured 80 numbered arched entrances at ground level. Each entrance corresponded to a numbered ticket — Roman spectators were directed to a specific gate, a specific staircase, and a specific seating tier. The system was designed so that the entire amphitheatre could be filled in approximately 15 minutes and evacuated almost as quickly. The barrel-vaulted passageways through which spectators moved between the exterior and their seating tiers are known as vomitoria — the term refers to the passageways, not to any activity that took place in them, and is derived from the Latin verb meaning to discharge or pour out.
Seating was strictly hierarchical. Senators occupied marble seats at ringside level. Above them sat the equestrian class, then the general male population, then women and the poor at the highest tiers. The emperor had a dedicated box, the pulvinar, at the short end of the oval directly above the arena floor. Distance from the action was a direct measure of social standing.
Above the seating, the Colosseum was fitted with the velarium, a vast retractable canvas awning that could be extended to shade the spectators below from the Roman sun. It was operated by a crew of sailors from the imperial fleet stationed in Rome specifically for this purpose. The velarium did not cover the arena floor itself, only the seating tiers, and required a ring of wooden masts mounted around the exterior attic level to support it.
Below the arena floor, Domitian's hypogeum formed a two-storey network of tunnels, corridors, and holding cells running the full length and width of the oval. Animals were kept in cages that could be raised directly to floor level through a system of counterweighted wooden elevators and trapdoors. Fighters moved through the underground passages to emerge at specific points in the arena. The engineering allowed the Colosseum's production team to control exactly what appeared on the arena floor and when, a level of stagecraft that remained unmatched in the ancient world.
What Remains Today and What Visitors Can Access
Roughly two thirds of the original Colosseum was dismantled or repurposed over the centuries following its abandonment. Travertine limestone was stripped from the exterior and reused in the construction of other Roman buildings, including St. Peter's Basilica. Bronze clamps holding the stonework together were melted down. Major earthquakes in 847 and 1349 caused significant structural collapse, particularly on the south side. What remains is a partial but still extraordinary structure, enough to understand the full scale and logic of the original building.
Standard Entry: Ground Floor, First and Second Tier
Standard entry gives access to the Colosseum interior including the ground floor level, the first tier, and the second tier. From these levels visitors look down into the exposed hypogeum, the underground network of tunnels and chambers is visible from above on standard entry, though access to the floor itself requires an upgraded ticket. The permanent exhibitions across the interior levels cover the history of the games, gladiatorial equipment, and the social structure of Roman spectator culture. A standard visit at this access level takes approximately 1 to 1.5 hours. For full details on what standard entry includes see our standard entry tickets guide.
Arena Floor
The original arena floor was a wooden surface laid over the hypogeum below. It no longer exists in its ancient form. What visitors walk on today is a partial reconstruction that covers a section of the underground chambers. Arena floor access is not available on standard self-guided entry and requires a specific upgraded ticket. Standing on the floor gives a direct view up to the seating tiers from the gladiator's perspective, an experience that is architecturally and spatially distinct from viewing the arena from above. For details on how to access the arena floor see our arena floor tickets guide.
The Hypogeum (Underground)
The underground chambers are among the most significant surviving elements of the Colosseum and among the most restricted. The hypogeum is only accessible as part of a guided tour. The hypogeum cannot be visited on a self-guided ticket regardless of tier. Daily capacity for underground access is strictly limited. The passageways, holding cells, elevator shafts, and service corridors that once moved animals and fighters directly onto the arena floor are largely intact and give a clear picture of how the spectacle above was engineered and staged. For details see our underground tickets guide.
Third Tier: Attic and Panoramic Lift
The third tier, the attic level, offers the highest accessible viewpoint inside the Colosseum and panoramic views across the surrounding archaeological area including the Roman Forum and Palatine Hill. Access requires a specific ticket tier above standard entry. A panoramic lift serves visitors with mobility limitations. For details see our full ticket comparison.
Arch of Constantine
The Arch of Constantine stands immediately adjacent to the Colosseum between the amphitheatre entrance and Palatine Hill. Built in AD 315 to commemorate Emperor Constantine's victory over Maxentius at the Battle of Milvian Bridge in AD 312, it is the largest surviving Roman triumphal arch in Rome - 21 metres high and almost 26 metres wide. It is free to view and requires no ticket. Many of its decorative panels were taken from earlier arches built for Hadrian, Trajan, and Marcus Aurelius, a common Roman practice of reusing material from previous monuments.
Ludus Magnus
Directly across Via di San Giovanni from the Colosseum lie the partially excavated remains of the Ludus Magnus, the largest gladiatorial training school in Rome. The school was connected to the Colosseum by an underground tunnel through which gladiators travelled on the day of the games. The ruins are visible from street level at no cost and include the outline of the training arena and surrounding cell blocks where gladiators lived. They are not accessible to enter but are worth a few minutes of attention for the direct physical connection they establish between training and performance.
The Colosseum Today: Key Facts for Visitors
- Opening time: 8:30 AM daily
- Closing time: Seasonal - last entry is 1 hour before closing; closing time ranges from 4:30 PM (winter) to 7:15 PM (summer). Check the current schedule before booking
- Closed: January 1 and December 25
- Annual visitors: ~15 million - one of the most visited monuments in the world
- Daily capacity: ~3,000 visitors at any given time
- Ticket: Timed entry - every ticket is assigned a specific 15-minute entry window. Walk-up purchase is unreliable, particularly between April and October. Advance online booking is strongly recommended
- Ticket price: From ~€18 adult as of 2026 - subject to change. Children aged 0-17: ~€6. Free entry for EU citizens under 18
- Booking window: Tickets release 30 days in advance on the official site (ticketing.colosseo.it) and cannot be purchased earlier than this window
- What's included: Standard entry includes the Colosseum interior plus Roman Forum and Palatine Hill access within a 24-hour window
- Getting there by metro: Metro Line B - Colosseo station, directly in front of the amphitheatre. Metro Line C. new Colosseum stop opened December 2025, connects to San Giovanni
- Getting there by bus: Routes 75, 81, 175, and 204 all stop nearby
- Getting there on foot: 15-minute walk south along Via dei Fori Imperiali from Piazza Venezia
For current seasonal hours, holiday closures, and the best times to visit with fewer crowds see our Colosseum opening hours guide. For full directions from different parts of Rome see our getting to the Colosseum guide.
Colosseum FAQs: Quick Answers Before You Visit
How long does a Colosseum visit take?
A standard self-guided visit covering the ground floor and first and second tiers takes approximately 1 to 1.5 hours. Adding the underground and arena floor extends a visit to 2 to 3 hours depending on the tour. If you are combining the Colosseum with the Roman Forum and Palatine Hill on the same day, allow a full 4 to 5 hours for the entire archaeological area. For a detailed breakdown by ticket type see our guide to how long to spend at the Colosseum.
Is the Colosseum worth visiting?
For most visitors, yes. The scale of the structure is not fully communicable through photographs - standing inside it gives a spatial and historical context that is genuinely different from reading about it. The value of the visit increases significantly if you have access to the underground or arena floor, both of which add direct physical engagement with how the building actually functioned. Standard entry alone is sufficient for a first visit. For an honest breakdown of what each access level delivers see our is the Colosseum worth visiting guide.
What is included in a Colosseum ticket?
Standard entry includes access to the Colosseum interior, ground floor, first and second tier, and permanent exhibitions, plus the Roman Forum and Palatine Hill within a 24-hour window. The underground, arena floor, and third tier (attic) require upgraded ticket types. For a full breakdown of every ticket type and what each one covers see our complete Colosseum tickets guide.
Can you visit the Colosseum for free?
Free entry is available on the first Sunday of each month for all visitors regardless of nationality. No advance booking is available on that day - entry is walk-up only and queues begin forming before opening. Free entry is also available year-round for EU citizens under 18, though advance booking is still required and a booking fee may apply. For full eligibility details see our free Colosseum entry guide.
Planning Your Colosseum Visit
The Colosseum requires advance planning in a way that most Rome attractions do not. Tickets are released 30 days in advance and sell out quickly during peak season - walk-up entry on the day is unreliable and unavailable on weekends and national holidays. The access level you choose determines what you see, how long you need, and how far ahead you need to book.
For everything you need to decide before booking, ticket types, vendors, prices, and how far ahead to secure your entry, see our complete tickets guide. For answers to the most common pre-visit questions see our Colosseum FAQs.