Commodus, Emperor of Rome from 177 to 192 AD, is remembered as one of the most notorious rulers in Roman history, yet the reality of his reign was stranger than the fictional portrait popularized by the film Gladiator. Believing himself to be the living incarnation of the god Hercules, he turned the Colosseum into a stage for his own ego, fighting dwarves, wild animals, and gladiators who were forbidden from harming him. He even used blunt weapons to guarantee his safety, while paying himself handsomely from the imperial treasury for every appearance. His rule was defined by cruelty, paranoia, and delusions of grandeur.
He ordered his sister murdered for plotting against him, executed his wife to make room for his mistress, and purged the Senate of anyone who opposed him. His reckless decisions fueled economic decline and famine, and his erratic behavior ultimately left Rome vulnerable to civil war. Born in 161 AD, Commodus was the son of Marcus Aurelius, the philosopher emperor whose reflective writings remain among the most revered works of ancient philosophy. His mother was Faustina the Younger, the youngest daughter of the late Emperor Antoninus Pius and also Marcus Aurelius’s first cousin, which created a strong dynastic link between the two families.
Together they had fourteen children, but only Commodus and four daughters survived into adulthood. Before the birth of Commodus and his twin brother Titus, Faustina reportedly had a vivid and ominous dream in which she gave birth to two snakes, one more powerful than the other. The vision seemed to foreshadow the future: Titus died young, as did several of their siblings, leaving Commodus as the sole surviving son. Commodus received a comprehensive education from numerous scholars tasked with cultivating his intellect, but the Historia Augusta suggests that troubling traits emerged early in his life.
One famous story recounts how, at just twelve years old, he ordered a servant to be thrown into a furnace because the bath water had not been heated properly. The servant’s life was spared only by the quick thinking of another slave, who threw a sheepskin into the furnace to produce smoke, convincing the young heir that his demand had been carried out. In 176 AD, Marcus Aurelius named Commodus co-emperor, a decision that reflected his desire to prepare his son for future leadership. But Commodus showed little promise as a wise ruler.
He indulged in excess, devoting himself to gladiatorial combat and chariot racing, and surrounded himself with sycophants who isolated him from the responsibilities of governing an empire. In a final attempt to instill discipline, Marcus took Commodus on a military campaign against the Marcomanni tribe in northern Europe. It was during this campaign, on March 17, 180 AD, that Marcus Aurelius died. The Roman public held the philosopher emperor in deep esteem for his wise and virtuous leadership, especially during the empire’s first true pandemic and the Germanic Wars.
Yet upon his father’s death, Commodus abruptly abandoned the campaign, despite victory being within reach, and returned to Rome. The historian Cassius Dio lamented the shift, describing his reign as the empire’s fall from a kingdom of gold to one of iron and rust. Commodus’s early years as sole emperor were marked by little success. Uprisings broke out across the empire, notably in Britain and North Africa, alongside renewed conflicts along the Danube.
In Rome itself, the aristocratic elite around the emperor indulged in decadence, excess, and violence, and the capital became a breeding ground for depravity. Lucilla, the daughter of Marcus Aurelius and a former empress through her marriage to co-emperor Lucius Verus, grew increasingly alarmed by her brother’s erratic behavior. Two years into his reign, she became involved in a conspiracy to assassinate him, planning to place herself and her husband on the throne. She enlisted her own nephew to carry out the attack, hiding behind a pillar in the Colosseum.
The plot failed when the would-be assassin hesitated, crying out “This is what the Senate has sent for you,” giving Commodus’s Praetorian Guard time to react and kill him. Lucilla’s role was uncovered, and she was exiled to the island of Capri with her daughter. Commodus later regretted showing mercy and sent a centurion to execute both of them. The betrayal of his own sister unraveled what was left of Commodus’s fragile mental state.
He became consumed by paranoia, seeing treachery in even the smallest actions. A violent purge followed, with the Senate emptied of its most influential members. While it is impossible to verify all the alleged conspiracies, it is clear that Commodus launched a campaign of terror against the aristocracy. Neglecting his imperial duties, Commodus left much of the empire’s governance to corrupt and self-serving advisors.
The prefects commanding the Praetorian Guard became key players in a web of violence and extortion, while the emperor fixated on the blood sport of the arena, finding solace in the gladiatorial games as the empire descended into disorder. Commodus’s passion for gladiatorial combat was so extreme that he personally entered the arena wearing the heavy armor of a class of gladiator known as a secutor. This scandalized Roman society, where gladiators were viewed as the lowest of the low, often slaves or criminals. The contemporary historian Herodian noted that spectators found it unseemly for an emperor to fight for sport when he could have been leading military campaigns against Rome’s barbarian foes.
Rumors spread that Commodus was not truly the son of Marcus Aurelius but the illegitimate offspring of a gladiator, fueled by the scandalous reputation of his mother, Faustina, who was infamous for numerous alleged affairs. Cassius Dio, a senator under Commodus, wrote graphic details of the emperor’s dangerous obsession, describing how he frequently killed or maimed his opponents while his enemies were always required to surrender rather than fight to the death. Victory was never in doubt. Dio also recorded extreme acts of cruelty.
In one disturbing incident, Commodus gathered Roman citizens without feet and beat them to death with a club, pretending he was a giant. He also used deadly weapons in private sparring matches against slaves who knew that beating the emperor would likely mean their own execution. Commodus took particular pleasure in including dwarfs in his gladiatorial exhibitions and often fought from an elevated platform to keep the advantage over his challengers. In stark contrast to his father, he was fiercely proud of his physical prowess.
The historian Herodian described him as strikingly handsome, and Commodus commissioned statues of himself dressed as Hercules with a lion’s skin and club. He abandoned his family name, proclaimed himself the son of Zeus, and erected statues throughout Rome to cement his divine image. His obsession with Hercules extended to fighting wild animals in the arena. He killed a hundred lions in a single day, though he used a bow from a safe vantage point while bodyguards stood by.
Giraffes, elephants, and hippos were also included in his exhibitions, always with safety measures in place. Commodus married Bruttia Crispina, a woman of noble heritage who was granted the title of Augusta. Described as graceful and tender-hearted, she was largely excluded from political affairs. The couple remained childless, creating a looming succession crisis.
After a decade of marriage, Commodus accused Crispina of adultery on grounds reportedly driven by paranoia and court intrigue, and she was executed. He never remarried, instead taking a mistress. Commodus also exhibited a disturbing fascination with the physically disabled. He kept disabled slaves in his palace for grotesque entertainments.
In one notorious episode, the Historia Augusta records that he ordered two hunchbacked slaves to be stripped naked and positioned on silver plates during a lavish banquet, with guests expected to eat off their backs. Aware of his fragile position, Commodus worked to maintain popular favor by distributing large amounts of money in the heart of Rome. These spectacles were a classic example of the Roman policy of bread and circuses. He also paid generous sums to legionaries and generals to secure military loyalty.
The rise of Cleander, a former slave who gained power through his close association with Commodus, further corrupted the empire. Cleander rose to command the Praetorian Guard and sold positions of power, including senatorial seats, military commands, governorships, and even consulships. When a food shortage struck Rome in 190 AD, the official responsible for the grain supply blamed Cleander, and riots broke out. Seeking refuge in the palace, Cleander begged Commodus for protection, but the emperor ordered his execution and that of his son to appease the mob.
Commodus’s infatuation with gladiatorial combat continued to drain the imperial treasury, funding lavish spectacles that undermined the stability of the empire. By late 192 AD, his delusions had reached new heights. He renamed the Senate the “Commodian Fortunate Senate” and had the head of the Colossal statue of Nero replaced with his own, portrayed as Hercules with a club in hand and a lion at his feet. In November of that year, he celebrated the Plebeian Games, shooting hundreds of animals in the morning and fighting as a gladiator every afternoon, never losing a match.
His delusions peaked when he announced a special day of games for January 1, 193 AD. His mistress Marcia implored him to cancel the games, but her pleas met with rage, and he threatened her life. Marcia soon uncovered a list of people he intended to execute, including herself and two other high-ranking officials. Realizing their danger, the three plotted to end his reign.
Marcia slipped a powerful poison into the emperor’s wine, but Commodus vomited it back up after a bath, a common occurrence for him after overindulging. With the poison having failed, the conspirators sent in Narcissus, Commodus’s personal wrestling partner and trainer. Entering the emperor’s bath, Narcissus strangled him to death. Upon his death, the Senate declared Commodus a public enemy.
Monuments bearing his likeness were destroyed, inscriptions with his name were erased, and statues were smashed or thrown into a river, symbolizing the attempt to purge the empire of his memory. His death plunged Rome into a period of profound instability, leading to a violent civil war known as the Year of the Five Emperors, with five different claimants vying for the throne. The Roman Empire would endure for another three centuries, but its subsequent history was plagued by internal strife, warfare, and gradual cultural decline. Periods of stability were fleeting, and even when exceptional leaders emerged, the scars of Commodus’s reign remained.
Unlike his father, who ruled with wisdom and virtue, Commodus saw himself not as a ruler but as a god. His reign, marked by cruelty, madness, and paranoia, did not expand the empire or lead it to victory in battle. Instead, it hastened its decline, leaving a legacy tarnished by tyranny.