Ancient Coin Denominations at a Glance

These labels are useful, but weight, metal, mint, date, and issuing authority matter just as much as the denomination name.

Greek Denominations: Obols, Drachms and Tetradrachms

The drachm is one of the best-known Greek silver denominations. In many Greek systems, six obols made one drachm. Larger silver coins included the didrachm, worth two drachms, and the tetradrachm, worth four.

That does not mean every Greek drachm weighed exactly the same. Cities and kingdoms used different weight standards. The Attic standard, associated especially with Athens and later Alexander the Great, produced drachms of roughly 4.3 grams and tetradrachms near 17.2 grams when fully on standard. Other regions used different standards.

For collectors, denomination is therefore only the beginning. A coin's weight and diameter can help identify it, but worn or underweight ancient coins should be attributed from the whole package: design, legend, style, metal, mint marks and historical context.

From the Kinzer Coins Collection

Kingdom of Persis Silver Hemidrachm

A drachm-family fraction in the flesh: a genuine silver hemidrachm, half a drachm, from the Kingdom of Persis in the Greek-influenced East.

$140.00 View This Coin

Persian Coins: Sigloi and Darics

The Achaemenid Persian Empire is famous for two major precious-metal denominations: the silver siglos and the gold daric. A conventional relationship of twenty sigloi to one daric is often used when describing the system, although real ancient monetary practice was more complicated than a modern fixed exchange-rate chart suggests.

Both types are closely associated with the familiar royal archer or running-king imagery of Achaemenid coinage.

What Was an Ancient Shekel?

“Shekel” began as a unit of weight and later became the name of several coin denominations in the eastern Mediterranean. There was no single ancient shekel with one universal weight. Carthaginian, Phoenician, Tyrian and Jewish revolt issues belong to distinct monetary contexts.

The best-known silver shekels for many collectors are the shekels and half-shekels of Tyre. Their high and relatively consistent silver content made them important in regional commerce. They are also discussed in connection with the Second Temple economy, although claims about any particular surviving coin being a specific biblical payment should be treated cautiously.

For the broader subject, see Ancient Shekels Explained.

Roman Bronze: As, Dupondius and Sestertius

Early Roman money included cast bronze, traditionally described through the aes grave system. The bronze as was originally tied conceptually to a Roman pound, although actual standards changed substantially over time.

Under the Empire, the as, dupondius and sestertius became familiar struck base-metal denominations. The sestertius was valued at four asses, while the dupondius was worth two. By the imperial period, brass and bronze color, portrait conventions and size can all help distinguish them, but no single visual rule works for every issue.

The Roman Denarius

The silver denarius became Rome's most important silver coin during the Republic and remained central to imperial currency for centuries. It was introduced around the late third century BC, conventionally dated to about 211 BC in the standard Roman Republican chronology.

Early denarii carried the numeral X, indicating a value of ten asses; later tariff changes altered that relationship. The denomination also changed dramatically in weight and silver purity over its long life.

Because Kinzer Coins has dedicated material on the denarius and its debasement, this hub keeps the discussion focused on how the denomination fits into the wider ancient monetary landscape. See Roman Denarius Debasement: How Rome's Silver Coin Changed Over 500 Years.

Antoninianus, Aureus and Other Roman Denominations

The antoninianus was introduced under Caracalla in AD 215. It was nominally valued above the denarius and is usually recognized on male rulers by a radiate crown. Over the third century its silver content declined sharply until many examples were effectively base metal with a thin silvered surface.

The aureus was Rome's major high-value gold denomination for much of the late Republic and early Empire. Its weight standard changed over time, so collectors should not assume every aureus belongs to one exact gram standard.

Other important Roman denominations include the quinarius, cistophorus, provincial drachms and tetradrachms, and the late Roman siliqua.

From the Kinzer Coins Collection

Valerian I Silver Antoninianus: NGC Certified (AD 253–260)

The denomination itself: a genuine NGC-certified antoninianus of Valerian, radiate crown and all, from the century that stretched Rome's silver to its limit.

$145.00 View This Coin

Late Roman and Byzantine Denominations

Late Roman reforms produced a new monetary landscape. The gold solidus, introduced under Constantine I after earlier experimentation with new gold standards, became one of the most stable high-value coins of late antiquity. Silver denominations included the siliqua, while copper systems repeatedly changed.

Byzantine coinage continued that evolution. The large copper follis became especially recognizable after Anastasius I's reform of AD 498, with value marks such as M for 40 nummi. Later Byzantine systems introduced denominations including the hyperpyron and the familiar concave trachea.

For the cup-shaped series, see What Is a Trachy?.

Why Ancient Coin Denominations Can Be Confusing

Ancient money did not work like a modern currency chart. Three things regularly confuse new collectors:

• The same denomination name could change over time. A denarius of the Republic is not identical in weight or silver content to a denarius centuries later.
• Different regions used different standards. A Greek drachm was not one universal weight everywhere.
• Coins circulated outside their issuing states. Trusted silver and gold coins could travel widely and be valued by weight, fineness, familiarity and local convention.

How to Identify an Unknown Ancient Denomination

Start with the coin's metal, weight, diameter, design and legend. Then ask where and when it was struck. Denomination should be the conclusion of an attribution, not a guess based on size alone.

For example, a 17-gram silver coin with Herakles and seated Zeus strongly suggests an Alexander-type tetradrachm, while a small silver Roman coin with Roma and the Dioscuri may point toward an early Republican denarius. Context separates superficially similar coins.

Frequently Asked Questions

Collecting by Denomination

Building a collection around denominations can show the evolution of money better than collecting rulers alone. A sequence from Greek drachm to Roman denarius to late Roman solidus or Byzantine follis turns monetary reform into something you can literally hold.

Browse available ancient coins, and use the denomination-specific guides in the Kinzer Coins Journal when you want to go deeper.

Denomination should be the conclusion of an attribution, not a guess based on size alone.

History wasn't just written. It was minted.