In the year 235, the Roman Empire stretched from the Atlantic coast of Spain to the Tigris River, from the Antonine Wall in Scotland to the Sahara Desert. It had been ruled, more or less continuously, by a single line of imperial authority for over two and a half centuries. Its currency was accepted from Britain to India. Its borders were defended by twenty-eight legions. It was, by every measure, the dominant political and military power of the ancient world.
By the year 270, that empire had effectively ceased to exist.
What replaced it was three rival states fighting each other, a collapsed silver currency, a plague that killed an estimated quarter of the urban population, the first capture of a Roman emperor by a foreign enemy, and a steady stream of soldier-emperors murdered by their own troops at an average rate of one every two years.
And then, against every reasonable expectation, the empire was put back together.
Modern historians call this period the Crisis of the Third Century — roughly AD 235 to 284. It is one of the most dramatic and least-taught episodes in Roman history. Most people who know about ancient Rome have heard about Caesar and Augustus, Nero and Caligula, perhaps Trajan and Hadrian. Far fewer have heard about Postumus, Claudius II Gothicus, Aurelian, or any of the desperate soldier-emperors whose names occupied the throne for months at a time during the worst decades.
The coins they struck survive in enormous numbers. Together, they tell the story of an empire that nearly fell — and somehow didn’t.
This post traces the arc through nine coins from the collection.
I. The Beginning of the End
AD 235 — Maximinus Thrax: The First Soldier-Emperor
The empire that Septimius Severus and his Severan dynasty had ruled with reasonable competence collapsed into chaos on the morning of March 19, 235, when soldiers of the Rhine legions assassinated the teenage emperor Severus Alexander and his mother in their tent at a military camp near Mainz.
Their replacement was Maximinus Thrax — a massive, semi-barbaric career soldier from Thracian peasant stock who had risen through the ranks of the Roman army. He had no senatorial pedigree. He was reportedly over seven feet tall. He spoke poor Latin. He had been chosen by the troops because he was a brilliant commander who could win them battles and pay them generously.
The Maximinus I Thrax Providentia Denarius struck early in his reign shows what the new political reality looked like. The obverse shows a portrait that contemporaries described as deliberately fierce — the prominent brow, the jutting jaw, the unmistakable military presence. There is no attempt at the philosophical refinement of Marcus Aurelius or the dynastic elegance of the Severans. This is a face that says: I rule because I command soldiers, and soldiers command everyone else.
The reverse shows Providentia — Foresight, divine providence — holding a wand and cornucopia. The propaganda message was straightforward: foresight has brought us this new emperor in our hour of need. The actual message embedded in the coinage was different and more troubling: the army now chose emperors. The Senate, the noble families, the dynastic traditions of two centuries of imperial rule — none of it mattered if the soldiers decided otherwise.
Maximinus would be assassinated by his own troops three years later, after which the empire would cycle through six emperors in a single year (AD 238).
The crisis had begun.
II. Brief Stability, Then Catastrophe
AD 238-244 — Gordian III: A Boy at the Edge of the Storm
After the chaos of 238, the throne went to a teenager: Gordian III, who was thirteen years old when he was proclaimed emperor by the praetorian guard. Real power lay with his praetorian prefect, Timesitheus, who attempted to stabilize the empire by reorganizing its eastern defenses.
The Gordian III Sestertius with Globe and Spear shows the careful staging of the boy emperor’s image. The obverse presents him as a young Roman commander — confident, military, prepared. The reverse shows him standing with a globe representing imperial dominion in one hand and a spear in the other. The implication was that this teenage emperor was carrying the full weight of Roman authority across the world.
He wasn’t. Gordian III died at age nineteen in 244, killed during a Persian campaign in Mesopotamia, in circumstances his eventual successor would prefer to keep murky.
That successor was a Syrian-Arab military commander named Philip.
AD 244-249 — Philip the Arab and the Empire’s Millennium
Philip I “the Arab” is one of the most peculiar emperors of the crisis. Born in modern-day Syria, possibly of Arab descent, he had risen through the army and the imperial bureaucracy before seizing the throne after Gordian III’s mysterious death. He negotiated a humiliating peace with the Sassanid Persians, paid an enormous indemnity, and returned to Rome to face mounting unrest.
In 248, he hosted one of the most ambitious propaganda events of the third century: the Saecular Games celebrating Rome’s thousandth birthday. The city had been founded, according to traditional Roman chronology, in 753 BC. In Roman counting, AD 248 was the millennium.
The Philip I Arab Elephant Antoninianus was struck for these celebrations. The reverse shows an elephant — exotic, eastern, an animal Romans rarely saw in person but which was paraded through the streets during the games. Philip imported wild animals from across the empire for what one ancient source describes as “the most magnificent spectacle that ever was.”
It was the last great civic celebration before the disaster. Within a year, Philip was dead — overthrown by his own general Decius. Within two years, Rome would face the first major outbreak of what is now known as the Cyprian Plague, named after the Christian bishop of Carthage who described its horrors in detail. Modern estimates put the death toll at 5,000 people per day at its peak in Rome alone. The plague would last for more than a decade, killing perhaps a quarter of the urban Roman population.
AD 249-251 — Decius: The Emperor Who Demanded Sacrifice
Trajan Decius ruled for just two years before dying in battle against invading Goths at Abrittus in 251 — the first Roman emperor ever killed by a foreign enemy on a battlefield. But during those two years he issued an edict that has echoed through history.
In 250, with the empire shaken by plague, civil unrest, and frontier collapse, Decius required every inhabitant of the empire to perform a public sacrifice to the traditional Roman gods and obtain a certificate (a libellus) confirming they had done so. Failure to comply meant arrest, imprisonment, and potentially execution.
The edict had explicit religious purpose — Decius believed the empire’s troubles came from the abandonment of the traditional gods. It also had political utility: it forced every Christian, every Jew, every member of any community whose religion forbade pagan sacrifice, to either apostasize or face state persecution. Thousands were martyred. Communities were torn apart. The early Christian church described this as one of its darkest periods.
The Trajan Decius Dacia Antoninianus shows the emperor’s regional anxieties. The reverse shows Dacia — the Roman province north of the Danube — personified as a female figure holding a draco (a Dacian dragon-headed military standard). Decius had been born in Pannonia, just south of Dacia, and his coinage emphasized his connection to the Danube frontier where most of the empire’s military disasters of his reign occurred.
He died fighting Goths there, alongside his son and co-emperor. His body was never recovered from the marsh into which it had fallen.
III. The Empire Shatters
AD 253-260 — Valerian and Gallienus: Father and Son Against Collapse
In 253, after the brief and chaotic reigns of Trebonianus Gallus and Volusian, a senior general named Valerian became emperor. He immediately elevated his adult son Gallienus as co-emperor and divided the empire’s defense: Valerian would handle the eastern frontier against the resurgent Sasanian Persians, while Gallienus would manage the Rhine and Danube frontiers against Germanic invasions.
The Gallienus “Joint Piety” Antoninianus commemorates their joint rule. The reverse shows the two emperors sacrificing together at an altar — father and son, equal partners, presenting a unified front against the empire’s enemies. The propaganda message was about stability and continuity. The reality was disaster.
In 260, the unthinkable happened. Valerian marched east against the Persians, met King Shapur I in battle near Edessa, was defeated, and was captured alive. He became the first and only Roman emperor ever taken prisoner by a foreign enemy. He spent the remaining years of his life in Persian captivity — used, according to later Roman sources, as a footstool by Shapur when the Persian king mounted his horse, eventually flayed alive and his skin stuffed and displayed in a temple.
Whether the more graphic accounts are accurate or Christian propaganda is debated. What is certain is that the most powerful man in the Roman world died in foreign captivity, and the empire could not free him.
The shock of Valerian’s capture was the moment the empire effectively shattered.
AD 260-269 — Gallienus Alone, and the Three-Way Split
After his father’s capture, Gallienus ruled alone for nine more years. He was a capable military commander and a patron of the arts, but he could not hold the empire together.
Within months of the news from the east, two breakaway states emerged. In the west, the general Postumus declared himself emperor of a new “Gallic Empire” that controlled Gaul, Britain, and Spain — roughly a third of Roman territory, governed from Trier as if Rome no longer existed. In the east, the city of Palmyra under Queen Zenobia gradually expanded its authority over Syria, Egypt, and Asia Minor, effectively becoming a third sovereign state.
The empire that Augustus had founded existed in three pieces.
The Gallienus “Hercules the Defender” Antoninianus is one of the most poignant coins of the crisis. The obverse shows the emperor in radiate crown. The reverse shows Herakles — divine son of Zeus, slayer of monsters, the strongest hero in Greek mythology, the same figure Alexander the Great had claimed as his own divine patron centuries earlier. The legend reads HERCVLI INVICTO — “to Unconquered Hercules.”
The propaganda message is straightforward: the empire stands. We have the protection of Hercules. We will overcome.
The actual situation was dire. The silver content of the antoninianus, which had once been around 40-50%, was now under 10%. The Gallic Empire to the west issued its own coinage. The Palmyrene state to the east controlled the wealthiest provinces. Plague continued. Inflation soared. Frontiers continued to be raided.
And yet — Gallienus did not collapse. He reformed the army, professionalizing the officer corps and developing a mobile cavalry reserve that could respond to threats anywhere along the frontier. He patronized Plotinus and the Neoplatonist philosophers. He preserved the central state through nearly a decade of unprecedented pressure.
When he was finally assassinated by his own officers in 268, he handed his successors an empire that was still intact, even if it was no longer whole.
IV. The Restorers
AD 268-270 — Claudius II Gothicus and the Beginning of Recovery
Claudius II ruled for less than two years before dying of plague. In that brief time, he won the decisive Battle of Naissus against an enormous Gothic invasion, killing or capturing tens of thousands of Goths and effectively ending the immediate northern threat to the empire. The Senate granted him the cognomen Gothicus in honor of the victory.
The Claudius II Gothicus “Concord of the Army” Antoninianus shows the propaganda strategy of the soldier-emperors. The reverse shows Concordia — Harmony, agreement — standing with patera (libation dish) and cornucopia. The message: the army is unified behind the emperor. There will be no more civil wars.
It was the kind of message that had to be issued because the opposite was true. The army had been fragmenting for decades, with rival emperors emerging from every major military command. Claudius II’s claim to military harmony was aspirational rather than descriptive — but for the moment, the most important Roman commanders were following his lead, and the Gothic victory had given them all something to celebrate.
When plague killed him in 270, his successor would be the man who actually reunited the empire.
AD 270-275 — Aurelian: Restitutor Orbis
Aurelian is one of the most remarkable figures in Roman history, and almost no one has heard of him.
In just five years on the throne, Aurelian:
- Defeated and absorbed the Palmyrene Empire (272), capturing Queen Zenobia and parading her in chains through Rome
- Defeated and absorbed the Gallic Empire (274), reunifying the three Roman states into one
- Reformed the currency, introducing a more standardized antoninianus with more reliable silver content
- Elevated Sol Invictus — the Unconquered Sun — to a central position in Roman state religion, building a massive temple to the god in Rome
- Built the massive defensive wall around Rome that still bears his name (the Aurelian Walls, 271-275)
The Aurelian Sol and Captives Antoninianus was struck in the final year of his reign and embodies his triumph. The reverse shows Sol Invictus standing in full majesty, his right hand raised, his left holding the celestial globe, while two bound and seated captives — representing the defeated enemies of Rome — sit on either side. The legend reads ORIENS AVG — “the Rising Sun of the Emperor.”
The symbolism was layered. Sol Invictus was a solar deity associated with the eastern provinces Aurelian had just reconquered. The captives represented the defeated Palmyrenes (and possibly the defeated Gauls). The message was complete: the empire is reunited, the sun god watches over us, the world has been restored.
The Senate gave him the title Restitutor Orbis — “Restorer of the World.”
He was assassinated by his own officers in 275, in one of history’s pettier political crimes. A clerical secretary had been caught embezzling and faced execution. To save himself, he forged a list of officers he claimed Aurelian was about to have killed and showed it to those officers. They murdered him preemptively, only to discover the list had been fabricated.
But Aurelian’s work held. The empire he handed to his successors was, for the first time in decades, a single state again.
V. The Foundation Rebuilt
AD 276-282 — Probus: The Empire Stabilizing
Probus took the throne in 276 after a chaotic interregnum following Aurelian’s death and ruled for six years — long by the standards of the crisis. He continued Aurelian’s work, suppressing barbarian incursions on the Rhine and Danube, defeating two usurpers, and pursuing a campaign of agricultural and economic restoration that included settling defeated Germanic tribes as farmers in depopulated Roman provinces.
The Probus Virtus Antoninianus shows the emperor in full military dress. The reverse shows him again, this time standing with a spear and a globe — the canonical posture of Roman military authority. The legend reads VIRTVS PROBI AVG — “the Virtue of the Emperor Probus.”
By this point, the propaganda had become familiar but the content was substantively different from the earlier crisis coinage. The emperor was no longer pleading for divine assistance or claiming aspirational stability. He was simply asserting what was, by 280, becoming actually true: the empire had a competent commander, a unified military, and frontiers that were holding.
Probus was killed by his own soldiers in 282 — apparently because he had assigned them to drain swamps and plant vineyards in their off-time, which the soldiers considered beneath their dignity. Even in the recovery, the soldier-emperor problem had not been solved.
AD 284 — Diocletian and the New Foundation
The crisis ended formally on November 20, 284, when an obscure military officer named Diocles was acclaimed emperor by his troops near Nicomedia in modern-day Turkey. He took the throne name Diocletianus and ruled for twenty-one years — by far the longest single reign of the third century.
Diocletian is one of the most important emperors in Roman history, though again, almost no one has heard of him. His reforms reshaped the Roman state so thoroughly that historians sometimes describe the empire after his reign as a fundamentally different institution from the one before.
He reorganized the empire into a Tetrarchy — rule by four emperors, two senior (Augusti) and two junior (Caesares), each responsible for a different geographic quarter. He doubled the size of the army. He restructured the provincial system, creating smaller, more manageable provinces. He attempted (with limited success) to fix prices and wages across the empire with the Edict on Maximum Prices. He launched the last and most violent Roman persecution of Christians. And critically — he established the principle of voluntary abdication, retiring peacefully in 305 to a fortified palace at Split (in modern Croatia) where he reportedly grew vegetables in his final years.
The Diocletian Jupiter Antoninianus shows the iconography of the new order. The reverse shows Jupiter with thunderbolt — the king of gods, the divine patron of the Tetrarchy, the figure Diocletian had explicitly chosen as his personal divine protector (he styled himself Jovius, “of Jupiter”). The legend reads IOVI CONSERVATORI — “to Jupiter the Conservator.”
This is no longer crisis coinage. The message is not “we are hanging on” or “we are restoring order.” It is “we are securely under divine protection, and the new order will hold.” The propaganda is calm because the situation, for the first time in fifty years, actually permitted calm.
The Empire That Emerged
Look at the arc.
In 235, the soldiers murdered an emperor in his tent and replaced him with a peasant general because no traditional Roman authority could resist them. In 284, the soldiers acclaimed a new emperor in an orderly succession that began a twenty-one-year reign and produced the most comprehensive reforms in Roman history.
Between those two moments, the empire lost its first emperor in foreign captivity, broke into three pieces, watched its currency collapse, endured a plague that killed millions, and cycled through more than twenty emperors at an average rate of one every two years.
And then it put itself back together.
The empire that emerged from the crisis was not the same empire that had entered it. The senate’s authority was permanently broken. The army’s role in choosing emperors was now openly acknowledged rather than discreetly hidden. The currency had been reformed but the silver standard of the early empire would never be recovered — the empire that Diocletian rebuilt was a bronze-currency empire, with gold for major transactions and an entirely transformed monetary system. The provincial structure was new. The frontier defenses were new. The religious landscape was new — Sol Invictus elevated, traditional gods reasserted under Diocletian, Christianity persecuted but not extinguished. Within a generation, Constantine would inherit the Diocletianic system and convert it into the foundation of Christian Rome.
The Crisis of the Third Century is sometimes told as the beginning of the end — the moment Rome started its long slide into eventual collapse. That’s not quite right. What actually happened was harder and more interesting. The empire of Augustus and Hadrian and Marcus Aurelius died during the third century. The empire of Constantine and Justinian was born from its wreckage. Two distinct Roman empires existed before and after the crisis, separated by fifty years of warfare and reconstruction in which the new state was forged out of the broken pieces of the old.
The coins record every step. The portraits get harsher. The silver disappears. The legends shift from celebrating Roman virtues to pleading for divine protection. Then, gradually, the propaganda stabilizes. The portraits become formal again. The reforms appear. The reigns lengthen.
By the time you reach Diocletian’s antoninianus with its calm Jupiter and its stable iconography, you are no longer looking at crisis coinage. You are looking at the beginning of late antiquity — the world that would carry Rome forward for another thousand years in the east, and another two centuries in the west.
The empire didn’t quite fall in the third century. But the empire that survived was no longer the one that had entered the crisis. The coins are the map of what happened in between.
To understand the imperial system that the third-century crisis transformed, see our post on the Five Good Emperors and our Republic-to-Empire arc through ten coins. To see the broader context of how Roman coinage itself evolved across this period, see our guide to Roman coin denominations. And to meet the rulers of the crisis individually, visit the Rulers & Authorities page.
