The World of Ancient Roman Coins
Ancient Roman coins are tangible connections to one of history's greatest civilizations. Spanning roughly eight centuries, Roman coinage documented emperors, gods, victories, buildings, and political propaganda with remarkable artistry. Today, these coins are among the most actively collected ancient artifacts — and unlike many antiquities, they remain legally collectible and widely available at all price levels.
The Roman coin market is mature and well-served by specialist dealers, auction houses, and an extensive body of reference literature. Whether you have found a single Roman coin or inherited a collection, this guide will help you understand what you have and what it might be worth.
Roman Coin Denominations
Imperial Coinage System
| Denomination | Metal | Typical Weight | Value Range Today |
|---|---|---|---|
| Aureus | Gold | ~7.5g | $2,000–$100,000+ |
| Denarius | Silver | ~3.5g | $50–$5,000+ |
| Sestertius | Orichalcum (brass) | ~25g | $100–$20,000+ |
| Dupondius | Orichalcum | ~13g | $50–$2,000 |
| As | Copper | ~10g | $30–$1,500 |
| Antoninianus | Silver/billon | ~3.5g | $20–$2,000 |
| Solidus | Gold (4th c. on) | ~4.5g | $500–$50,000+ |
Republican Coinage
Roman Republican coins (c.211 BC-27 BC) predate the emperors and feature different designs: the goddess Roma, the Dioscuri (Castor and Pollux), and later the portraits and symbols of competing political leaders like Julius Caesar, Brutus, and Mark Antony. The famous "EID MAR" denarius of Brutus, commemorating the assassination of Caesar, is among the most valuable ancient coins — an example sold for over $4 million in 2020.
Republican denarii are collected by Crawford number (from Michael Crawford's standard reference "Roman Republican Coinage"). Common types are available for $75-200, while rare types and high-grade examples command thousands or tens of thousands.
Imperial Portraits: Reading the Story
Every Roman imperial coin tells a story through its portrait and inscriptions. The obverse shows the emperor (or empress, or member of the imperial family) with a Latin inscription giving their names and titles. Learning to read these abbreviated legends is the key to identification.
Common Title Abbreviations
- IMP — Imperator (military commander/emperor)
- CAES — Caesar (imperial title)
- AVG — Augustus (supreme imperial title)
- P M — Pontifex Maximus (chief priest)
- TR P — Tribunicia Potestas (tribunician power — renewed annually, helps date coins)
- COS — Consul (followed by number, e.g., COS III = third consulship)
- P P — Pater Patriae (Father of the Country)
The style of portraiture evolved dramatically over the centuries. Early imperial portraits (Augustus, Tiberius, Nero) are realistic and refined. Second-century portraits (Hadrian, Marcus Aurelius) show mature classical style. Third-century portraits become rougher and more military. Fourth-century portraits are increasingly stylized and abstract, with large eyes and geometric features.
Collecting Strategies
The Twelve Caesars
One of the most popular collecting goals is assembling coins of the Twelve Caesars — the first twelve rulers from Julius Caesar through Domitian, as chronicled by Suetonius. This set spans a price range from very affordable (Vespasian denarii from $75) to extremely expensive (Julius Caesar and Augustus portrait coins from $1,000+, and rare types from $10,000+).
Building by Theme
Many collectors focus on themes: architecture (coins showing temples, the Colosseum, harbors), animals, military campaigns, specific provinces, or particular emperors. Thematic collecting allows deep expertise and the satisfaction of building a coherent, meaningful collection regardless of budget.
Provincial Coins
Roman Provincial coins were minted throughout the empire by local authorities, often featuring local temples, landmarks, and deities alongside the imperial portrait. This is a growing collecting area that offers excellent value — interesting provincial coins are often available at a fraction of the price of equivalent Roman mint issues.
The Market for Roman Coins
The ancient coin market is served by specialist auction houses including Classical Numismatic Group (CNG), Heritage Auctions (ancient department), Roma Numismatics, and numerous European houses. Major coin shows (NYINC, Long Beach, Munich) provide opportunities to buy from dealers and build relationships.
Prices for common types have been relatively stable, while rare and exceptional pieces continue to set records. The market for high-grade Roman gold has been particularly strong, driven by collectors seeking portable stores of value with historical significance.
Provenance matters increasingly in the ancient coin market. Documented ownership history (ex-collection references, old dealer tickets, auction catalog appearances) adds confidence about authenticity and legal status. Always prefer coins with traceable histories.
To begin identifying your Roman coins, try our AI-powered identification tool. For expert valuation and selling, find specialist numismatic dealers through our dealer directory. Read our selling guide for strategies on getting the best price for rare coins. Explore more collecting guides in our Knowledge Hub.