Collecting Every Roman Emperor: How to Build a Complete Coin Set
“I want one coin of every Roman emperor” is one of the most appealing goals in ancient coin collecting. It is also a project that becomes much more complicated once you decide what “every emperor” actually means.
Before buying toward a complete set, define your rules. A clear checklist can save years of confusion, unnecessary expense, and duplicate purchases.
How Many Roman Emperors Were There?
There is no single universally correct number. The total changes depending on where you begin and end and whether you include co-emperors, junior Augusti, disputed rulers, usurpers, emperors of breakaway states such as the Gallic Empire, and rulers recognized in one part of the empire but not another.
For coin collectors, the better question is not “What is the official number?” but “What rules define my set?”
Choose Your Checklist Before You Buy
A collector might choose a straightforward run of generally recognized emperors from Augustus through the end of the Western Empire. Another might include the Gallic emperors, Palmyrene rulers, major usurpers, Caesars who never became Augustus, empresses, or the Eastern Roman emperors who continued ruling long after AD 476.
Write the scope down before you begin. Otherwise the finish line will keep moving.
Why Some Roman Emperors Are Easy to Collect
Long-reigning rulers and emperors who controlled large mints often survive in enormous numbers. Coins of Constantine the Great, Constantius II, Gallienus, Claudius II Gothicus, and many other rulers can be found across a wide range of grades and prices.
These accessible emperors let a new collector build momentum quickly, which is one reason an “every emperor” set can feel surprisingly easy at first.
Which Emperors Make the Set Difficult?
The challenge arrives with short reigns, civil wars, regional rulers, and emperors whose coinage was produced in much smaller quantities. Depending on the checklist, difficult or expensive names can include Gordian I, Gordian II, Otho, Didius Julianus, Pescennius Niger, Procopius, Eugenius, and Romulus Augustulus.
These rulers are not equally rare, and some appear at auction with reasonable regularity. But they can cost dramatically more than the common emperors that make up the first part of a collection.
Was Romulus Augustulus Really the Last Western Roman Emperor?
Romulus Augustulus was deposed in AD 476 and is traditionally called the last Western Roman emperor. The story is more complicated for collectors.
Julius Nepos, whom Romulus' father Orestes had displaced, continued to claim the Western imperial title from Dalmatia and retained recognition from the Eastern emperor. Nepos survived until AD 480. That means a collector who wants the last legitimate Western emperor may choose to end with Julius Nepos rather than Romulus Augustulus.
Neither choice is “wrong” if the rules of the collection are clearly defined.
Three Ways to Define an Every-Emperor Set
1. Core Imperial Set
Collect the generally recognized Augusti of the central Roman state and omit most usurpers, breakaway rulers, and junior family members. This is the most manageable version.
2. Expanded Historical Set
Add major breakaway regimes and important rival emperors—for example the Gallic emperors and significant civil-war claimants. The historical story becomes richer, but scarcity and cost rise quickly.
3. Specialist Completion Set
Include disputed rulers, rare usurpers, Caesars, empresses, and regional authorities whenever coinage exists. At this level, the project can become a lifetime pursuit and some names may be effectively unobtainable for many collectors.
A Better Way to Build the Collection
Instead of attacking the full list immediately, build it in phases. Good milestones include the Julio-Claudians, the Year of the Four Emperors, the Flavians, the Five Good Emperors, the Severans, the Crisis of the Third Century, the Tetrarchy, and the Constantinian dynasty.
Finishing smaller groups gives the collection structure and keeps the project enjoyable even while the hardest rulers remain open.
Set a Quality Standard Before the Rare Coins Appear
Decide early whether your goal is simply an identifiable portrait, a readable legend, a particular grade, or a consistent level of eye appeal. Without a standard, collectors often overspend near the end of the set simply because a missing ruler finally appears.
It is perfectly reasonable for a rare emperor to be represented by a modest coin while common emperors are represented by higher-grade examples.
Frequently Asked Questions
Can you realistically collect every Roman emperor?
You can build a very broad emperor set, but a truly exhaustive checklist that includes rare usurpers and disputed rulers can become extraordinarily difficult and expensive.
Who is the hardest Roman emperor to collect?
There is no single answer because it depends on the checklist, denomination, and standard of quality. Several short-lived emperors and usurpers are much harder than ordinary imperial rulers.
Should Julius Nepos be included?
If your set includes the final legitimate Western emperors, yes. Romulus Augustulus is the traditional 476 endpoint, while Julius Nepos continued to claim the title until 480.
What is the best way to start?
Begin with one dynasty or period, learn the coinage, and expand gradually. A well-defined partial set is more satisfying than an undefined checklist that constantly changes.
Final Thought
An every-emperor collection can be one of the most rewarding long-term projects in Roman numismatics. The trick is to define what “complete” means before the hunt begins.