The Circo Massimo (Circus Maximus) is the oldest, largest, and most continuously used entertainment venue in Rome's history — a chariot racing track in the valley between the Palatine and Aventine hills, first used for races in the 6th century BC according to tradition, continuously expanded through the Republican and Imperial periods, and reaching its maximum capacity of approximately 250,000 spectators in the Imperial period. No stadium has ever been larger in human history by spectator capacity — modern comparison: the largest current stadium (Rungrado stadium, Pyongyang) holds 114,000. Almost nothing stands above ground today because the Circus was systematically quarried for building material from the early medieval period onward — the marble seating, the concrete substructure, the decorative elements all became the raw material for churches, palaces, and fortifications. The specific story of why Rome's greatest stadium is now a public park is the story of medieval Rome's relationship with its own past. Rome guide
Plan my Italy trip →Location: Valley between Palatine and Aventine hills, Rome | Original dimensions: 621 m long × 118 m wide | Maximum capacity: ~250,000 spectators (Imperial period) | Use period: 6th century BC – 549 AD | What survives: The valley shape; partial excavations visible on eastern end; the Circo Massimo Experience underground museum | Entry to park: Free; underground experience €12
The Circus Maximus in its final Imperial form was 621 metres long and 118 metres wide — the racing track was approximately 540 metres in length with the turning posts (metae) at each end. The seating rose in tiers on both the long sides and the curved end, accommodating approximately 250,000 spectators according to the testimony of Pliny the Elder; modern estimates based on the known dimensions and typical Roman seating density range from 150,000 to 300,000. No stadium built before or after has matched this capacity. The Colosseum, often assumed to be Rome's largest venue, held approximately 50,000–80,000; the Circo Massimo held 3–5 times as many. The primary event: chariot races (the ludi circenses, the circus games) — teams of 2–4 horses pulling a light chariot, 7 laps of the track, approximately 8–9 minutes per race. A full day of games included 24 races.
The social function of the Circus was distinct from the Colosseum's gladiatorial shows: men and women sat together at the Circus (Ovid recommended it specifically as a venue for meeting women, in the Ars Amatoria), unlike the Colosseum where women were relegated to the upper tiers. The four racing factions (the Blues, Greens, Reds, and Whites — later effectively the Blues and Greens) commanded passionate fan loyalty that extended through the social classes; emperor support for a faction was politically significant. The last recorded race at the Circus Maximus was in 549 AD, under the Ostrogothic king Totila — approximately 1,100 years after the first recorded games.
The Circus Maximus ceased functioning in 549 AD when the last games were held; it was then simply available as a source of pre-cut, pre-worked stone and concrete for a medieval city that had neither the workforce nor the economic resources to quarry fresh building material. The marble seating — hundreds of thousands of tons of carved marble — was progressively removed from the 6th century onward for lime burning (marble heated to high temperature produces calcium oxide, the basis of mortar; the medieval lime kilns around Rome operated on ancient marble), for reuse in church construction, and for ground building fill. The substructure (the concrete and travertine vaults supporting the seating) was similarly robbed for its travertine blocks. By the 10th century, large sections of the seating had been converted to warehouses and workshops; by the 12th century, the Frangipani family had built a fortified tower complex in the curved end of the Circus. By the Renaissance, it was principally used for salt production and as a garbage dump. The systematic archaeology of the site began only in the 20th century.
The public park (free, always open): the valley shape of the Circus is clearly visible — the long rectangular depression between the Palatine and Aventine hills retains its exact ancient dimensions; the specific raised ground at the eastern curved end (the carceres — the starting gate area) is the only significant above-ground topographic feature. The Circo Massimo Experience (underground, eastern end, entry €12) opened in 2021 as an archaeological and digital experience in the excavated carceres area — a combination of actual excavation (the starting gate foundations, the Roman water channel, the marble flooring fragments) and digital reconstruction showing what the full Circus looked like at maximum development. The Palatine Hill (separate ticket, €12) rises immediately above the Circus on the north side; looking down from the Palatine into the Circo Massimo valley gives the clearest spatial understanding of the ancient relationship between the emperor's residence and his people's entertainment venue below. Palatine Hill guide →
The Circo Massimo (Circus Maximus) is an ancient chariot racing stadium in the valley between the Palatine and Aventine hills in Rome — the largest entertainment venue ever built in history, with a maximum capacity of approximately 250,000 spectators in the Imperial period. Used for chariot races from the 6th century BC to 549 AD (approximately 1,100 years of continuous use). Almost no structure survives above ground — the marble, concrete, and stone were systematically quarried for medieval building material from the 6th century onward. The valley shape of the 621 m × 118 m Circus is clearly visible as a public park; the Circo Massimo Experience underground museum (entry €12) has excavated sections and digital reconstruction.
The Circo Massimo in its Imperial-period maximum development: 621 metres long, 118 metres wide, approximately 540 metres racing track. Spectator capacity approximately 250,000 (Pliny the Elder's figure; modern estimates based on dimensions range from 150,000 to 300,000). For comparison: the Colosseum held 50,000–80,000 (3–5 times fewer); the largest current stadium in the world (Rungrado, Pyongyang) holds 114,000 (less than half). The Circo Massimo is the largest stadium in human history by spectator capacity — a record that has not been approached in any era.
The Circo Massimo is now a flat valley because the entire built structure (marble seating, concrete substructure, decorative elements) was progressively removed for building material from the 6th century AD onward. The marble was primarily burned in lime kilns to produce mortar (medieval Rome's most essential building material); the travertine blocks were reused in churches and palaces; the concrete aggregate was used for fill. By the Renaissance, the site was a garbage dump and salt production facility. This pattern of ancient monument cannibalism was the standard Roman building practice from the fall of the Western Empire until the 18th-century archaeological movement began protecting surviving monuments.
The Circo Massimo public park is Rome's largest flat outdoor event space and is regularly used for: major outdoor concerts (the largest acts that play Rome use the Circo Massimo — recent concerts by The Rolling Stones, Vasco Rossi, and other major acts; capacity approximately 80,000–100,000 standing); political rallies (the left margin of Italian politics, the Partito Democratico national rallies); and the finish line of the Rome Marathon (the Maratona di Roma finishes at the Circo Massimo, usually in March — approximately 18,000 runners). The park is also used daily by Roman families, joggers, and dog walkers — one of the more pleasant Rome park experiences within the historic centre.
Yes. The Circo Massimo Experience opened in 2021 in the excavated eastern end of the Circus (the carceres, the starting gate complex). Entry approximately €12; approximately 1.5 hours. The experience combines actual archaeological remains (the Roman foundations, water channels, marble floor fragments, starting gate structural elements) with digital projection reconstruction showing the full Circus at its Imperial maximum. The experience is specifically designed for visitors who want to understand what the site originally looked like rather than simply standing in the empty valley. Book online at circomassimo.it; the underground space is limited capacity.
Circo Massimo underground experience + Palatine Hill above + Colosseum + Domus Aurea — the complete ancient Rome circuit.
Plan my Rome trip →Chariot racing at the Circo Massimo was organised around four factions (factiones) identified by their racing colours: the Blues (Veneta), the Greens (Prasina), the Reds (Russata), and the Whites (Albata). By the late Republic and Imperial period, the Blues and Greens had absorbed the Reds and Whites respectively, leaving two dominant factions with passionate, organised fan bases extending from Rome throughout the Empire. Emperor Caligula was a passionate Green supporter and reportedly ate and slept in the stables; Caracalla was an ardent Blue. The faction rivalry extended beyond sports into politics and street violence — a precursor to both modern ultras culture and to the urban political violence of later Byzantine fan factions (the Nika riots in Constantinople in 532 AD, which killed approximately 30,000 people, began as a Blue-Green confrontation). The specific social function: the faction membership crossed class and gender lines, uniting aristocrats and plebeians in shared partisan identity in a way that the Colosseum's segregated seating explicitly prevented.
The legend of Alaric's treasure is connected to the Busento river in Cosenza (Calabria), not the Circo Massimo — but it is the most famous buried treasure story in Italy and worth noting in the Rome-Calabria historical connection. Alaric I (c.370–410 AD), king of the Visigoths, sacked Rome in 410 AD — the first sack of Rome in 800 years. He then marched south through Calabria but died at Consentia (Cosenza) before reaching North Africa. According to the historian Jordanes (6th century), Alaric was buried in the bed of the Busento river (which was temporarily diverted, the burial made, and the river restored — all the slaves who performed the work were killed to prevent disclosure of the site). The treasure of Rome, looted in 410 AD, has never been found. The Busento river in Cosenza is the alleged burial site; periodic treasure-hunting proposals surface and are rejected by the Italian archaeological authorities.
Yes — the Circo Massimo park is one of Rome's most popular jogging locations. The flat oval path around the valley floor (approximately 900 metres per lap) is used continuously by Roman runners and walkers throughout the day. The surface is a combination of gravel and packed earth; the path is lit at night. The Circo Massimo hosts the finish line of the Maratona di Roma (Rome Marathon, usually March, approximately 18,000 runners) and various 5K and 10K charity runs throughout the year. The park is free, open at all hours, has public toilets near the main entrance on Via del Circo Massimo, and is one of the most pleasant outdoor exercise spaces in the historic centre.
The Aventine Hill rises immediately south of the Circo Massimo — one of Rome's seven traditional hills, with a specific character as the most peaceful and aristocratic residential quarter in the ancient city. Today: the Giardino degli Aranci (Orange Garden) on the summit gives the most intimate panoramic view of Rome — the Tiber bend, St Peter's dome, the Trastevere rooftops, the Palatine Hill — in a quiet public garden with no admission charge. The famous Knights of Malta keyhole (the Priorato di Malta, in Piazza dei Cavalieri di Malta) gives a precisely framed view of St Peter's dome through a perfectly aligned garden avenue when viewed through the keyhole of the priory gate. The Basilica di Santa Sabina (422 AD, one of the oldest complete basilicas in Rome, with the oldest surviving carved wooden door panels in Christianity — 5th century, depicting Biblical scenes including the earliest Crucifixion image) is on the Aventine, 10 minutes walk from the Circo Massimo.