Roman Republican Coinage: From the Aes Grave to the Imperators

Before there was a denarius

Rome came late to coined money and arrived at it sideways. Before roughly 280 BC there was no Roman coinage at all in the Greek sense, only aes rude, shapeless lumps of bronze weighed out by the transaction, and then aes signatum, large rectangular cast ingots stamped with a type. What followed was unique in the ancient Mediterranean: aes grave, heavy bronze coinage that was cast in moulds rather than struck from dies, on the libral standard of the Roman pound. The denominations descend by the uncial system — as, semis, triens, quadrans, sextans, uncia — and the earliest as is a genuinely large object, the heaviest pieces well over three hundred grams of bronze. Nothing in the Greek world looks like this. While Magna Graecia and the Greek cities were striking fine silver, Rome was casting bronze by the pound.

Struck silver arrived under the pressure of the wars with Carthage. From around 280 BC Rome issued silver didrachms in the Greek manner — the so-called Romano-Campanian series, produced at Greek-staffed southern mints — running in parallel with the cast bronze for the better part of a century. It was a hybrid, transitional money: Greek technique, Roman authority, no settled system yet. The settled system came next, and it lasted four hundred years.

The reform that built an economy

Around 211 BC, in the worst years of the Second Punic War, Rome reorganised its coinage from the ground up and introduced the denarius: a silver coin of roughly four and a half grams, tariffed at ten bronze asses, which is where the name comes from — deni, "by tens". Beneath it sat the quinarius at five asses and the sestertius at two and a half, the Republican sestertius being a small silver coin, not the big brass medallion the word later means under the emperors. The bronze as kept shrinking — the libral pound was already a fiction by the time the denarius appeared — and around 141 BC the denarius was formally retariffed to sixteen asses to match what had already happened in practice.

This is the structural fact of Roman money. The denarius is the unit legionary pay is reckoned in, the unit the tax system runs on, the coin that carries Roman imagery into every province as the territory expands. When you read about a soldier's stipend or a senator's property qualification, the number is in denarii or sestertii. The system Rome built around 211 BC is the one Augustus inherited largely intact and the one the early Imperial coinage simply put a portrait on.

Coins that argue

Here is what makes Republican silver unlike almost anything else in ancient numismatics. The mint was supervised by three junior magistrates a year, the tresviri monetales, and from the second century BC they began signing the coinage with their family names — and then, fast, using the coin types themselves as personal political advertisement. A moneyer of the gens Iunia puts the tyrannicide of 509 BC on his denarius because the family claimed descent from him. An Aemilius shows a Macedonian victory monument because an ancestor won the battle. A Caecilius Metellus parades an elephant because the family beat Hasdrubal's elephants in Sicily.

The effect is that Republican denarii are a signed, dated political archive. You can read the propaganda of the late Republic off the coinage almost year by year — ancestral claims, factional slogans, the Sullan and Marian quarrel, the slow constitutional breakdown — because every moneyer is making an argument about his family's standing in a competitive aristocracy. No Greek city coinage does this, and no Imperial coinage does it either, because under the emperors there is only one argument worth making and only one man allowed to make it. This is the one period where the coins talk back.

The imperators

The late Republic does have dominant individuals, and their coinage is the most historically charged in the series. Sulla struck as imperator during the dictatorship. Pompey the Great and, after his death, his sons coined for the Pompeian cause from Spain and the sea. Then Caesar: the elephant denarius of 49 BC (RRC 443/1), trampling a serpent, struck in vast numbers to pay the civil war, and then in early 44 BC something genuinely new — a denarius with Caesar's own portrait, a living Roman on the regular coinage, breaking a convention the Republic had held for two and a half centuries. Within weeks he was dead, which is the point of the next coin.

Brutus issued the EID MAR denarius (RRC 508/3) in 43 to 42 BC, on campaign, after the assassination. The reverse puts two daggers either side of the pileus, the cap given to a freed slave, over the legend EID MAR — the Ides of March. It is the most openly political coin in antiquity: one of the assassins, advertising the killing as the liberation of Rome, on money paid to the army raised to defend the deed. Fewer than a hundred or so silver specimens are recorded. The far rarer gold version holds the headline auction records for any ancient coin — the example Roma Numismatics sold in 2020 made a little over three million pounds, though that coin was later repatriated to Greece, which is its own cautionary tale about provenance. Mark Antony's answer was quantity, not rarity: the legionary denarii of 32 to 31 BC (RRC 544), a galley on one side and a legionary standard with the legion's number on the other, struck to pay the fleet before Actium and so common today that they are most collectors' first piece of Republican silver. The whole tradition ends at the settlement of 27 BC, when Octavian becomes Augustus and the coinage stops being the Republic's and starts being the emperor's.

The denominations

The working set. NumisLens catalogues the Roman denominations that carry into the Imperial series — the links go to the live denomination pages, which include Republican material alongside the Imperial.

Denomination	Metal & rough weight	What to know
As (aes grave & later)	Bronze, cast then struck	The libral cast as is a heavy object, 300 g+ in the first issues. Janus head / prow. Later struck asses are far lighter as the bronze standard erodes.
Denarius	Silver, ~4.5 g → ~3.9 g	The workhorse from c. 211 BC. Moneyer types are the family-heraldry archive; imperatorial issues are the civil-war history. The heart of the series.
Quinarius / Victoriatus	Silver, small	Half-denarius and the related victoriatus. Struck intermittently; never the main coin. Catalogued under the broader denomination facets where present.
Sestertius (Republican)	Silver, ~1 g	A small silver quarter-denarius — not the big brass Imperial sestertius, which is a separate, later denomination. A common point of confusion.
Bronze fractions	Bronze, token	Semis, triens, quadrans, sextans, uncia. Increasingly token-like through the late Republic as the bronze standard collapses.
Aureus	Gold, ~8 g	Republican gold is rare and occasional — Sullan, Caesarian, late imperatorial donatives. The aureus as a regular denomination is an Imperial development.

One practical note for the beginner. The temptation is to start with an Antony legionary denarius because it is cheap and famous. Fine — but buy one with the legion number actually legible, because a worn-flat reverse is the difference between a historical document and a slug of old silver, and dealers price the two the same to the unwary.

RRC numbers and the catalogue

A point of honesty about how this maps onto NumisLens. The NumisLens catalogue is organised by denomination, mint, and ruler, and it includes Republican coins under those facets — Republican denarii sit in the denarius catalogue, the cast and struck bronze under the as, and the central mint at Rome carries the bulk of the Republican output. What NumisLens does not yet offer is a per-RRC-number index: there is no "RRC 443/1" page of its own the way there is a page for a denomination. For RRC-number lookup the canonical free resource is Coinage of the Roman Republic Online (CRRO) at the American Numismatic Society, which is built directly on Crawford's catalogue and is where the type numbers live. Use CRRO for the number, then the NumisLens denomination and mint pages for the wider context and comparanda. The natural next steps within NumisLens are the Roman Imperial hub for what comes after 27 BC, the forthcoming Roman provincial hub for the local civic coinages that ran alongside, and the planned Roman denarius guide for the denomination in depth.

Collecting and the market

Republican is one of the best-value serious fields in ancient numismatics, because the supply of moneyer denarii is large and the history attached to them is enormous. Almost every Republican collection starts from the same coin — a common moneyer denarius, the cheapest doorway into a signed political archive two thousand years old, and the benchmark the rest of the series is read against. A common moneyer denarius in Very Fine sits roughly in the low hundreds, with better metal, sharper strikes, or historically charged types running several hundred to well over a thousand. Antony's legionary denarii are abundant and cheap for what they are — a presentable Very Fine is a couple of hundred dollars, more for the scarce legions. Caesar's elephant denarius climbs with grade from around a thousand into the mid-thousands for a sharp Extremely Fine, and his lifetime portrait denarius is a five-figure coin in any honest grade. The EID MAR is its own universe, seven figures, and not a collecting target so much as a museum object that occasionally trades. Heavy first-issue aes grave is surprisingly expensive simply because large clean cast bronze rarely survives well.

Field habits worth keeping. Strike and centring matter more than the grade label on Republican silver, because so many dies were cut by competent-but-not-brilliant hands and the flans were small for the type. Tooling and smoothing are common on the expensive imperatorial pieces — have anything above a few thousand dollars vetted. Provenance is not optional on the headline coins; the EID MAR repatriation is the loud reminder, but the principle runs all the way down. The auction houses that handle the series seriously are NAC, CNG, Roma, Künker, and Heritage, with Bertolami in Rome and Goldberg in Los Angeles regular for it; their archives on acsearch are the honest price guide. Crawford's RRC is the reference to own; Sydenham is the older numbering you will still see quoted; Burnett's Coinage in the Roman World is the readable background. Buy the coin, not the slab, and learn the moneyer families — that is where the whole subject opens up.

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