Dalmatius Coins: Constantine’s Nephew, Caesar of AD 335–337, and the Purge After Constantine’s Death
Dalmatius Coins: Constantine’s Nephew, Caesar of AD 335–337, and the Purge After Constantine’s Death
For Two Years He Wore the Purple of a Caesar. Then Constantine Died, the Soldiers Turned, and His Coins Became the Last Record of a Succession Plan That Never Came to Be.
For most collectors, the Constantinian dynasty begins with Constantine the Great and continues through his sons. But in the final years of Constantine’s reign, the emperor briefly widened the circle of men who might share power. One of them was his nephew Dalmatius—also spelled Delmatius in older scholarship and on his coin legends.
Dalmatius held the rank of Caesar for only about two years, from AD 335 to 337. His career ended abruptly after Constantine died, when a violent purge eliminated much of the emperor’s extended male family. That short span of power makes Dalmatius one of the more intriguing figures of the late Constantinian world and gives his bronze coins unusual historical weight: they were struck during the last phase of Constantine’s reign, just before the dynasty was violently narrowed to Constantine’s sons.
Who Was Dalmatius?
Dalmatius was a nephew of Constantine I, not one of Constantine’s sons. His father, also named Flavius Dalmatius, was a half-brother of Constantine. Dalmatius therefore belonged to the broader Constantinian imperial family and grew up close enough to the throne to become part of Constantine’s final arrangement for governing the empire.
He was also the brother of Hannibalianus, another nephew whom Constantine elevated to an extraordinary position late in his reign. Together, the brothers show that Constantine was not necessarily planning to leave the Roman world exclusively to his three surviving sons.
Constantius I Chlorus Antoninianus: Founder of the Line, AD 293 to 296
Where this whole family began: Constantius I was father to both Constantine and the elder Flavius Dalmatius, making him the grandfather of the Caesar in this article. Under $40.
Why Did Constantine Make Dalmatius Caesar?
On September 19, AD 335, Constantine elevated Dalmatius to the rank of Caesar. In the fourth-century imperial system, Caesar was a junior imperial title below Augustus. Dalmatius was therefore a member of the ruling college, but he was not an Augustus and should not be described as a sole Roman emperor in the same sense as Constantine.
Ancient and modern reconstructions associate Dalmatius with territories in the Balkans and Greece, commonly including Thrace, Macedonia, and Achaea. His promotion fit Constantine’s broader effort to distribute authority among members of the imperial family while preserving an overarching dynastic structure.
The arrangement was short-lived. Constantine died on May 22, AD 337, before any stable succession system involving Dalmatius could take root.
The Crisis After Constantine’s Death
Constantine’s death created one of the most violent succession crises of the fourth century. During the months that followed, soldiers killed a number of adult male relatives from collateral branches of the Constantinian family. Dalmatius and his brother Hannibalianus were among the victims.
Exactly who ordered or encouraged the purge remains debated. Ancient sources are not fully consistent. Eutropius, writing later in the fourth century, says that Dalmatius was killed in a military mutiny and portrays Constantius II as having sanctioned rather than directly ordered the act. Other traditions have led historians to suspect that Constantius II may have played a more active role. The safest conclusion is that Dalmatius died in the dynastic purge that followed Constantine’s death, while the precise chain of responsibility cannot be established with certainty.
The political result is clearer than the motive. After the bloodshed, Constantine’s surviving sons—Constantine II, Constantius II, and Constans—became the dominant male heirs and were proclaimed Augusti in September AD 337.
Dalmatius Coinage: A Two-Year Window Into the Constantinian Dynasty
Dalmatius’s coins are especially interesting because his official career was so brief. His imperial coinage belongs essentially to the narrow period between his elevation in AD 335 and his death in AD 337.
Most collectors encounter Dalmatius through small late Roman bronze coins, often cataloged by modern numismatists as AE3-sized pieces or related late Constantinian bronze denominations. Exact denomination terminology for fourth-century bronzes can vary among catalogs, so diameter, weight, mint, and reference number are often more useful than relying on a single ancient denomination name.
How to Identify a Dalmatius Coin
The first place to look is the obverse legend. A common form reads:
FL DELMATIVS NOB C
This expands approximately to Flavius Delmatius Nobilissimus Caesar, identifying Dalmatius as a most noble Caesar. The spelling DELMATIVS on coins helps explain why collectors will encounter both “Dalmatius” and “Delmatius” in references and dealer descriptions.
His portrait is typically shown facing right, often laureate and cuirassed. Because late Constantinian portraits can resemble one another, the legend is usually the most dependable starting point for attribution.
GLORIA EXERCITVS: The Army on Dalmatius’s Coins
The reverse most strongly associated with Dalmatius is GLORIA EXERCITVS, meaning roughly “the glory of the army.” The familiar design depicts two soldiers facing one another, each holding a spear and shield, with military standards between them.
This was not a design created specifically for Dalmatius. It was a major Constantinian dynastic type used for Constantine and other members of his family. That is precisely what makes it historically useful: Dalmatius was inserted into an already established visual language of legitimate Constantinian rule.
During the 330s, the GLORIA EXERCITVS design appears in versions with two standards and, later, a reduced one-standard form. Dalmatius can be found within this broader transition. Online Coins of the Roman Empire records Dalmatius examples with the legend FL DELMATIVS NOB C and the military reverse, including issues attributable to the late Constantinian period.
Why the Military Reverse Mattered
The Roman army was not merely a battlefield institution. It was one of the foundations of imperial legitimacy. A new Caesar needed to be presented not simply as a relative of Constantine, but as a recognized member of the ruling order with a relationship to the army that defended and, at times, selected emperors.
GLORIA EXERCITVS therefore carried an especially pointed message for Dalmatius. His portrait and title appeared on one side; the disciplined Roman army appeared on the other. Within two years, however, soldiers would be involved in the violent events that ended his life.
Were Dalmatius Coins Struck at Only One Mint?
No. Dalmatius coinage was produced within Constantine’s multi-mint imperial system, and surviving issues are known from several mints. Mint marks in the exergue are therefore important for attribution and collecting.
Collectors should avoid assuming that every FL DELMATIVS NOB C / GLORIA EXERCITVS bronze is identical. Bust style, number of standards, mint mark, officina, weight, diameter, and small field details can distinguish individual catalog varieties.
Are Dalmatius Coins Rare?
Dalmatius coins are considerably less ubiquitous than bronzes of Constantine I, Constantius II, or Constans, which is understandable given his roughly two-year tenure as Caesar. But “rare” is too broad a label to apply to every Dalmatius bronze. Some types and mints appear with enough regularity that collectors can realistically add him to a Constantinian set, while particular mint and variety combinations can be much scarcer.
Condition matters heavily. Late Roman bronzes often circulated extensively, and weak strikes, worn legends, deposits, and irregular flans are common. A coin with a clear DELMATIVS legend and readable mint mark can be especially useful to a collector interested in historical attribution rather than simply portrait quality.
Collecting Dalmatius in a Constantinian Dynasty Set
Dalmatius makes a particularly rewarding addition to a family-based Roman collection because he forces the collector beyond the familiar father-and-sons narrative. A broader Constantinian set might include Constantine I, Crispus, Constantine II, Constantius II, Constans, Helena, Fausta, Dalmatius, Hannibalianus, and later Julian II and Constantius Gallus.
Seen together, their coins reveal that Constantine’s dynasty was more complicated than a simple succession from one emperor to three sons. The imperial family contained multiple possible lines of authority, and the violence of AD 337 dramatically reshaped which branches survived.
Fausta Bronze: Empress of Constantine's Age, NGC, AD 324 to 326
Straight from that dynasty list: Fausta, Constantine's empress, herself eliminated in a palace tragedy a decade before the purge. An AE3 like the Dalmatius bronzes, NGC certified.
Dalmatius’s Legacy
Dalmatius left no long reign, major law code, monumental building program, or famous military conquest. His importance comes from where his brief career sits in Roman history.
His elevation demonstrates that Constantine was still experimenting with the distribution of dynastic power near the end of his life. His death exposes the instability hidden beneath that arrangement. And his coins preserve the official image of a Caesar whom the regime presented as a legitimate Constantinian ruler only months before he was eliminated.
That contrast is what makes a Dalmatius bronze more than an obscure late Roman coin. It is a surviving artifact from a succession plan that did not survive Constantine himself.
A Dalmatius bronze is a surviving artifact from a succession plan that did not survive Constantine himself.
Frequently Asked Questions About Dalmatius
Was Dalmatius a Roman emperor?
Dalmatius was a Roman Caesar from AD 335 to 337, a junior imperial ruler under Constantine I. He was not elevated to the senior title of Augustus.
Was Dalmatius a son of Constantine the Great?
No. Dalmatius was Constantine I’s nephew. His father, Flavius Dalmatius, was Constantine’s half-brother.
Why is Dalmatius sometimes called Delmatius?
Both spellings appear in modern references. His coin legends commonly use DELMATIVS, while “Dalmatius” is the standard form often used by modern historians.
When did Dalmatius rule?
Constantine elevated him to Caesar on September 19, AD 335. He was killed during the dynastic violence that followed Constantine’s death in AD 337.
Who killed Dalmatius?
Dalmatius was killed by soldiers during the purge of Constantine’s extended family in AD 337. Ancient sources differ over the degree of responsibility borne by Constantius II, so it is better to describe his direct role as disputed rather than certain.
What is the most recognizable Dalmatius coin type?
Collectors frequently encounter bronze coins with FL DELMATIVS NOB C on the obverse and GLORIA EXERCITVS on the reverse, showing two soldiers with military standards.
Why collect a Dalmatius coin?
Dalmatius offers an affordable way, depending on type and condition, to represent one of the shortest and most dramatic branches of the Constantinian dynasty. His coins connect directly to Constantine’s final succession arrangements and the violent political reset of AD 337.
History wasn’t just written. It was minted.
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