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Antonine Plague

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The Antonine Plague was a massive epidemic that struck the Roman Empire. It lasted from AD 165 to AD 180. This event occurred during the Pax Romana. This was a period of high influence and territorial control for Rome.

Aurelius180AD
Aurelius180AD

The plague is also known as the Plague of Galen. This name honors a Greek physician who described the illness. It was the first known pandemic to affect the entire Roman Empire. This widespread sickness changed the course of Roman history.

Scholars continue to debate the exact cause of the disease. Many experts believe it was smallpox. They base this on descriptions of red and black skin eruptions. However, recent genetic evidence suggests severe smallpox arrived in Europe later. Some researchers suggest measles might be the cause instead. There is currently no genetic evidence from the plague to confirm this. J. F. Gilliam concluded that written sources are not enough to identify it. The evidence from inscriptions and coins remains inconclusive.

Galenosgruppe (Wiener Dioskurides)
Galenosgruppe (Wiener Dioskurides)

The Greek physician Galen provided vital observations. He traveled to and from Rome during the outbreak. He recorded symptoms in his treatise, Methodus Medendi. He noted that patients suffered from fever and diarrhea. He also observed pharyngitis, which is inflammation of the throat. A skin eruption appeared on the ninth day of illness. These eruptions could be dry or pustular. Galen's descriptions help us understand the symptoms, even if the name is uncertain.

The plague likely began during a military campaign. Roman soldiers were besieging the city of Seleucia in Mesopotamia. This happened during the winter of 165–166 AD. The soldiers may have brought the disease back to the empire. The disease spread through land and sea connections. It reached the city of Smyrna in Roman Anatolia. From there, it moved to Gaul and the Rhine legions. By AD 172, it reached nearly every corner of the empire.

The impact on the population was devastating. The Roman Empire had about 75 million people at its peak. It is believed the population declined after the plague. Total deaths are estimated between 5 and 10 million people. This represents roughly 10% of the empire's population. In the city of Rome, a later outbreak in AD 189 was severe. The historian Cassius Dio reported 2,000 deaths per day in Rome. This accounted for 25% of those affected in the city.

Memorial plaque commemorating soldiers who died in the Antonine Plague
Memorial plaque commemorating soldiers who died in the Antonine Plague

The Roman army faced a massive crisis. The disease was particularly deadly for soldiers. It hit during the Marcomannic Wars against Germanic tribes. The plague reduced the army almost to extinction. Emperor Marcus Aurelius had to find new soldiers quickly. He recruited gladiators, slaves, and even bandits to fill the ranks.

Marcus Aurelius Sestertius 177 860042
Marcus Aurelius Sestertius 177 860042

Even the co-emperor Lucius Verus died from the plague in AD 169.

Historians disagree on the long-term significance of the plague. Some believe it marked the beginning of Rome's decline. They argue the empire never fully recovered from this blow. Others think the impact was less catastrophic than described. They suggest it was just one of many frequent epidemics. However, the plague likely caused major economic setbacks. Commercial activity in the Indian Ocean suffered a setback. This disruption may have contributed to social instability and economic decline.

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File:Aurelius180AD.png
Aurelius180AD.png
File:Galenosgruppe (Wiener Dioskurides).jpg
Galenosgruppe (Wiener Dioskurides).jpg
File:Memorial plaque commemorating soldiers who died in the Antonine Plague.jpg
Memorial plaque commemorating soldiers...
File:Marcus Aurelius Sestertius 177 860042.jpg
Marcus Aurelius Sestertius 177 860042.jpg
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