Area Sacra di Largo Argentina: Where Julius Caesar Was Killed

Most visitors walking between the Pantheon and Campo de' Fiori cross a wide, traffic-choked square called Largo Argentina without a second glance at the sunken ruins fenced off in its middle. That's a mistake. Those weathered column stumps and temple platforms sitting several meters below modern street level are the Area Sacra di Largo Argentina, a cluster of four Republican-era temples that predates the Colosseum by roughly three centuries, and, more famously, the exact ground on which Julius Caesar was assassinated on the Ides of March in 44 BC.

For decades the site could only be admired from above, through railings, while Rome's famous stray cats sunbathed on 2,200-year-old marble. That changed in 2023, when the area finally opened to walk-in visitors with a raised walkway threading through the temple platforms. It is now one of the most underrated stops in central Rome: genuinely ancient, historically loaded, and almost never crowded.

What you're actually looking at

The Area Sacra ("sacred area") is a rectangular complex of four temples, conventionally labeled Temple A, B, C, and D since their original dedications were lost to time and only partially recovered through archaeology. They were built at different points between the 3rd and 2nd centuries BC, making this one of the oldest collections of religious architecture surviving anywhere in Rome. The site sits roughly six meters below the modern pavement, which tells you how much the city's ground level has risen over two millennia of rebuilding, flooding, and rubble accumulation.

• Temple A, the northernmost, originally dedicated possibly to Juturna, later partly converted into a medieval church (San Nicola de' Calcarariis), whose apse is still visible cut into the ancient structure
• Temple B, a round temple, the only circular one in the group, believed to be dedicated to Fortuna huiusce diei ("Fortune of this day"), built to commemorate a military victory
• Temple C, the oldest of the four, dating to the early 3rd century BC, with the most archaic-looking masonry on site
• Temple D, the largest, partly still buried under the modern street, dedicated to the Lares Permarini according to inscriptions

Behind the temples, a curved structure of brick once formed the back wall of the Theatre of Pompey's portico, the covered colonnade attached to Rome's first permanent stone theater, completed in 55 BC.

The Ides of March, on this exact spot

The detail that turns this from "some old ruins" into one of the most consequential locations in Western history is what stood here in 44 BC: the Curia of Pompey, a large meeting hall built as part of Pompey's theater complex. The Senate had been using it as a temporary meeting place while their usual Curia Hostilia was being rebuilt. On 15 March 44 BC, Julius Caesar walked into that hall for a Senate session and was stabbed twenty-three times by a group of senators, including Brutus and Cassius, who believed they were saving the Republic from a king in all but name.

Et tu, Brute?, the line Shakespeare gave Caesar in his dying moment, set centuries later but forever tied to this spot.

Archaeologists have identified the approximate location of the Curia within the excavated area, and a marker (added relatively recently) now indicates roughly where the assassination took place, a startling thing to stand in front of on what is otherwise just a noisy Roman traffic island. Because the Senate considered the building cursed after the murder, the Curia of Pompey was later sealed up and effectively erased from civic use, which is part of why so little of it survives compared to other Roman structures of similar importance.

Why it's called "Argentina", not Argentina the country

The name has nothing to do with South America. It comes from Argentina, an old title for the medieval-era Palazzo del Banco di Santo Spirito and, more specifically, from the title "Argentoratum", the Latin name for the city of Strasbourg. A 16th-century papal official, Johannes Burckardt, who served as a master of ceremonies under several popes, came from Strasbourg and was nicknamed "Argentinus" after the city's Latin name. He built a house nearby, the area took on the nickname, and it stuck for the square ever since, an example of how often Rome's place names trace back to one obscure person rather than anything grand or symbolic.

How the ruins were rediscovered

The temples lay buried under later construction for centuries. They were uncovered between 1926 and 1929 during Mussolini-era urban redevelopment of the city center, part of a broader (and often destructive) program of clearing "medieval clutter" to expose ancient Rome, the same era that opened up the Roman Forum's wider sightlines and cut the Via dei Fori Imperiali through the imperial forums. In this case the excavation was a genuine archaeological win: it revealed one of the best-preserved groups of Republican temples anywhere, protected (somewhat accidentally) by having been buried rather than continuously built over.

For most of the 20th and early 21st centuries, the site was visible only from the surrounding sidewalk through a low fence, a frustrating arrangement for a site this significant, and one that turned the square into an informal, beloved cat sanctuary run by volunteers from the Torre Argentina Cat Sanctuary, which still operates from a corner of the site today.

Visiting the walkway today

A municipally funded restoration project, opened to the public in mid-2023, added a raised steel walkway that loops through the temple platforms at close range, with multilingual information panels explaining each structure. It's a paid, ticketed visit, usually requiring online or on-site reservation through Rome's municipal culture portal, and visit duration is short, most people are through in 20 to 30 minutes.

• Book a slot in advance during peak season (spring and early autumn), as timed-entry capacity is limited
• Wear flat, grippy shoes, the walkway has metal grating and can be slick after rain
• Bring a phone for photos, afternoon light cuts dramatically across the temple columns
• Look for the Caesar assassination marker near Temple B/the former Curia footprint
• Budget time for the cat sanctuary information point at the corner of the site

Even without going inside, the site rewards five minutes leaning on the railing above: it's one of the only spots in Rome where you can see multiple centuries of Republican-era temple architecture stacked together in one glance, framed by modern tram lines and espresso bars.

The cat sanctuary you didn't expect

Since the 1920s, Largo Argentina's sunken ruins have unofficially doubled as a home for Rome's street cats, and since 1994 the Torre Argentina Cat Sanctuary has run a proper, volunteer-staffed shelter from a corner of the excavation, caring for around 100-150 cats at any time, many adoptable. It is funded entirely by donations and gift-shop sales, and it has become a quietly famous stop for animal-loving travelers. The juxtaposition (sacred Republican temples, the ground where a dictator was murdered, and a community cat shelter) is purely Roman in its layering of eras and uses on top of one another.

Getting there and what's nearby

Largo Argentina sits almost exactly midway between the Pantheon and Campo de' Fiori, making it an easy, almost unavoidable stop if you're walking between the two, both about a five-minute walk away. It's also a major tram and bus interchange, so it's easy to reach from across the city. Combine a visit with the Pantheon, Campo de' Fiori's morning market, and the Jewish Ghetto, all within a 10-15 minute walk, for a half-day loop through Rome's compact historic core.

If you'd rather have all of this explained on the spot by someone who knows exactly where the Curia stood and why the name "Argentina" has nothing to do with the country, a guided Rome city walking tour that passes through this part of the centro storico will fold in details a self-guided visit easily misses.

Practical tips for a smooth visit

• Opening hours are generally 10:00-18:00, with last entry roughly an hour before closing, check the official booking page for current hours before you go, as they shift seasonally
• The site is not large; pair it with neighboring stops rather than planning a dedicated half-day around it alone
• Wheelchair and stroller access on the walkway is limited due to the raised steel grating, check current accessibility notes when booking
• Photography is allowed without flash; tripods are generally discouraged given the narrow walkway
• There's no dedicated visitor parking, this is a walk-or-public-transport destination only

What happened to the conspirators afterward

The assassination didn't resolve anything the way Brutus, Cassius, and the other conspirators hoped. Rather than restoring the Republic, Caesar's death triggered over a decade of civil war. His adopted heir Octavian (the future Augustus) allied briefly with Mark Antony to hunt down the assassins, defeating Brutus and Cassius at the Battle of Philippi in 42 BC, both of whom took their own lives rather than be captured. Octavian and Antony then turned on each other, and by 31 BC, after the Battle of Actium, Octavian stood as the sole power in Rome. Within a few years he was Augustus, Rome's first emperor, meaning the murder committed at Largo Argentina to prevent one-man rule directly accelerated the empire it was meant to stop. Few single events in Roman history carry that level of historical irony, and it happened on the exact ground now crossed by Rome's number 8 tram.

The Senate itself reacted to the murder with a mixture of horror and superstition. Because the killing took place inside Pompey's Curia, the hall was considered ritually polluted (a religious concept the Romans called nefas). The Senate voted to seal the building permanently rather than continue using it for meetings, and it was eventually walled up entirely, part of why so little of the structure survives compared to other major Republican buildings, and why archaeologists have had to work mostly from written accounts and foundation traces to pin down exactly where within the complex the murder occurred.

The Theatre of Pompey, Rome's first stone theater

It's easy to miss that the temples and the assassination site were never an isolated religious complex, they were part of a far larger entertainment and civic district built by Pompey the Great in 55 BC: Rome's first permanent stone theater, capable of seating an estimated 10,000-20,000 spectators. Before Pompey's theater, Roman theatrical performances had been staged in temporary wooden structures, torn down after each festival, partly because conservative senators worried that a permanent theater would encourage idleness and moral decay. Pompey got around this objection by attaching a temple to Venus Victrix at the top of the seating, technically making the whole complex a religious sanctuary with theater-shaped seating rather than a theater outright, a very Roman workaround.

The theater's curved seating section (the cavea) shaped the footprint of the medieval and modern streets that grew up around it; if you look at a map of the neighborhood today, the unusually curved block of buildings just southwest of Largo Argentina traces the exact outline of Pompey's ancient seating bowl, fossilized in the city's street plan for two thousand years. The Curia where Caesar was killed stood within the theater's attached portico complex, used by the Senate as a convenient large meeting hall while their usual building was under repair.

Frequently asked questions

Is Largo Argentina free to visit?

You can view the entire excavated area for free from the surrounding sidewalk railings at any time, day or night. Walking down onto the raised walkway among the temples requires a paid, timed-entry ticket.

How long does a visit take?

Most visitors spend 20-30 minutes on the walkway itself. Viewing from above takes only a few minutes, making it an easy add-on to a Pantheon or Campo de' Fiori visit.

Can you see exactly where Caesar was killed?

A marker within the site indicates the approximate location of the Curia of Pompey, where ancient sources place the assassination. The original building no longer stands, so this is an approximation based on archaeological and textual evidence, not an exact spot.

Are the cats still there?

Yes. The Torre Argentina Cat Sanctuary continues to operate from a corner of the site, caring for Rome's resident colony and welcoming visitors and adopters.

What to bring and when to go

Because the visit is short and mostly outdoors, there's little special preparation needed beyond comfortable shoes and, in summer, sun protection, the walkway has minimal shade and the metal grating absorbs heat. Morning visits (shortly after opening) tend to be quietest, since the square is more of a transit hub than a tourist magnet and most visitors pass through midday on their way between the Pantheon and Campo de' Fiori. If photography is a priority, aim for late afternoon, when low sunlight rakes across the temple platforms and brings out the texture of the weathered stone far better than the flat light of midday.

• Comfortable, flat shoes for the metal walkway grating
• Sun hat or light scarf in summer, almost no shade on site
• A printed or downloaded map of the temple layout, since on-site signage is informative but easy to skim past quickly
• Small change or a card for the cat sanctuary donation box if you stop by

One last detail worth knowing

Largo Argentina is also a working transit hub, trams and buses circle the square constantly, which is part of why so many visitors register it only as a noisy traffic island rather than a historic site. That contrast is worth sitting with for a moment: the ground beneath some of Rome's loudest modern traffic is also the ground where the ancient world's most famous political murder took place, and where temples older than the Colosseum have quietly outlasted empires, popes, and two thousand years of city planning. Few stops in Rome offer that much historical density for the price of a short pause at a crosswalk railing.

Why this stop is worth the detour

Largo Argentina rewards visitors precisely because it asks so little of them. There's no timed-entry crowd crush, no hour-long line, and no need to set aside a half-day. What it offers instead is one of the rawest, least-touristed connections to a single, world-changing date in Roman history, set among temple ruins old enough to make the Colosseum look comparatively modern. Stand at the railing, find the assassination marker, watch a cat stretch out on a 2,200-year-old column drum, and you've experienced one of the more quietly powerful five minutes Rome has to offer.

Most travelers plan entire days around the Colosseum or the Vatican Museums, and rightly so, but it's worth remembering that Rome's density of history means even a transit square can hold this much weight. Largo Argentina asks for almost nothing and gives back one of the most direct lines to a single, world-altering afternoon in 44 BC that the city has to offer.