What Does SC Mean on a Roman Coin?
Short answer: SC stands for Senatus Consulto — "by decree of the Senate". It appears in large letters on the reverse of Roman imperial brass and bronze coins: the sestertius, dupondius and as. It never appears on the imperial denarius or aureus, and that division tells you something real about how Rome organised its money.
If you have picked up a large brassy Roman coin, there is a good chance the reverse is dominated by two letters with the actual design squeezed around them. That is SC, and it is one of the most frequently asked questions in Roman numismatics precisely because it is so prominent and so unlike anything on modern coinage.
The constitutional story
When Augustus reconstructed the Roman state after 27 BC, he did so by preserving Republican forms while holding the substance of power himself. Coinage was reorganised along the same lines (Sutherland, 1974). Gold and silver — the coinage that paid the legions and settled large debts — came under the emperor's direct control. The base-metal coinage that ordinary people used for daily transactions was issued in the name of the Senate, and marked accordingly.
How much genuine authority the Senate exercised over the bronze is debated by historians, and the honest answer is probably not much by the later first century (Burnett, 1987; Howgego, 1995). But the presentation mattered enormously to a regime whose legitimacy rested on the fiction of restored Republican government, and the mark was maintained for close to three hundred years.
Where SC appears — and where it does not
| Denomination | Metal | Carries SC? |
|---|---|---|
| Aureus | Gold | No |
| Denarius | Silver | No |
| Antoninianus | Billon | No |
| Sestertius | Orichalcum (brass) | Yes — usually large, in the field |
| Dupondius | Orichalcum | Yes |
| As | Copper | Yes |
| Semis, quadrans | Copper | Usually yes |
This makes SC genuinely useful for identification. A Roman coin with a big SC on the reverse is imperial aes coinage, which immediately narrows both the denomination and the period. Combine it with the diameter and weight and you can usually separate sestertius from dupondius from as in seconds — see our step-by-step identification method.
How SC is laid out
The placement varies and is worth learning to read:
- Large, centred, filling the field — typical where the reverse has no pictorial type, especially on smaller denominations. The letters are the design.
- Flanking the reverse figure, S to the left and C to the right — the commonest arrangement on sestertii with a personification or deity.
- In the exergue, beneath the ground line — less common, and easily confused with a mint mark.
- Within the reverse legend as EX S C, ex senatus consulto, "in accordance with a decree of the Senate". Also found on some Republican issues, where it marks a special authorisation for an extraordinary issue.
The provincial exception
One case regularly confuses people. Large silver tetradrachms struck at Antioch in Syria also carry SC, in Greek-speaking territory, on precious metal. This is not the Roman Senate authorising silver: it reflects the local civic and provincial arrangements at Antioch, where the formula was adopted into a quite different coinage tradition. If you have a big silver coin with a Greek legend and SC on the reverse, you are in the world of Roman Provincial Coinage, not the imperial series, and it needs a different catalogue (Burnett, Amandry and Ripollès, 1992).
When SC disappeared
The mark died with the coinage that carried it. Through the 3rd century, inflation and debasement made the sestertius uneconomic to strike — the metal in a large brass coin was worth more than its face value — and the aes denominations collapsed (Harl, 1996). As they went, so did SC. The reformed coinages of Aurelian and Diocletian, and everything after, use mint marks and control letters in the exergue instead. If a coin carries a mint mark like SMANTB rather than SC, it belongs to that later world; our guide to mint marks and officinae covers how to read them.
The other abbreviations people ask about
SC is the most asked, but it rarely arrives alone. Here are the others that come up constantly:
| Mark | Latin | Meaning |
|---|---|---|
| S C | Senatus Consulto | By decree of the Senate |
| EX S C | Ex Senatus Consulto | In accordance with a decree of the Senate |
| S P Q R | Senatus Populusque Romanus | The Senate and People of Rome |
| TR P | Tribunicia Potestate | Holding tribunician power; the numeral dates the coin |
| COS | Consul | Consulship; numeral counts how many times held |
| P M | Pontifex Maximus | Chief priest of the state religion |
| P P | Pater Patriae | Father of the fatherland |
| IMP | Imperator | Victorious commander; also counted with numerals |
| AVG | Augustus | The reigning emperor; AVGG is two, AVGGG three |
| D N | Dominus Noster | Our lord; standard from the late 3rd century on |
| VOT X MVLT XX | Vota decennalia, multa vicennalia | Vows paid for ten years of reign, undertaken for twenty |
| XXI / KA | — | Aurelian's reform mark, understood as a 20:1 metal ratio (Metcalf, 2012) |
Learning these two dozen marks converts most Roman coins from an indecipherable object into a readable document. The legend names the ruler, the titles date him, the reverse states the message, and SC tells you who authorised the metal in your hand.
Frequently asked questions
What does SC stand for on a Roman coin?
Senatus Consulto, meaning by decree of the Senate. It appears in large letters on the reverse of Roman imperial brass and bronze coins — the sestertius, dupondius and as — indicating that the issue was struck under the Senate authority.
Why is there no SC on silver and gold Roman coins?
Because the emperor controlled precious-metal coinage directly while base-metal coinage was issued in the Senate name. The division was largely a matter of constitutional presentation rather than real independence, but it was observed consistently: SC marks the aes coinage and is absent from the imperial denarius and aureus.
When did SC stop appearing on Roman coins?
It faded out during the crisis of the 3rd century, as the sestertius and its relatives collapsed under inflation and the Senate ceased to be a meaningful part of the coinage story. By the monetary reforms of the late 3rd century the mark had effectively gone from the regular imperial series.
Does SC mean the coin is rare or valuable?
No. SC is one of the commonest features on Roman coinage — it appears on a very large share of surviving imperial bronze. It tells you the denomination family and the issuing authority, which helps identification, but it carries no premium at all.
References
- Burnett, A. (1987) Coinage in the Roman World. London: Seaby.
- Burnett, A., Amandry, M. and Ripollès, P.P. (1992–) Roman Provincial Coinage. London: British Museum Press / Paris: Bibliothèque nationale de France.
- Harl, K.W. (1996) Coinage in the Roman Economy, 300 B.C. to A.D. 700. Baltimore: Johns Hopkins University Press.
- Howgego, C. (1995) Ancient History from Coins. London: Routledge.
- Mattingly, H., Sydenham, E.A., Sutherland, C.H.V. and Carson, R.A.G. (eds.) (1923–1994) The Roman Imperial Coinage. 10 vols. London: Spink.
- Metcalf, W.E. (ed.) (2012) The Oxford Handbook of Greek and Roman Coinage. Oxford: Oxford University Press.
- Sear, D.R. (2000) Roman Coins and Their Values, Volume I: The Republic and the Twelve Caesars, 280 BC–AD 96. London: Spink.
- Sutherland, C.H.V. (1974) Roman Coins. London: Barrie and Jenkins.
Referencing follows the Harvard (author–date) system. Where figures are given as approximate ranges, they are drawn from the works above; published analyses differ by mint, issue and method, and market figures reflect prices observed at the date of writing.