Plague of Justinian

The plague of Justinian or Justinianic plague (AD 541–549) was an epidemic of plague that afflicted the entire Mediterranean Basin, Europe, and the Near East, especially the Sasanian Empire and the Byzantine Empire. The plague is named for the Byzantine Emperor Justinian I (r. 527–565) who, according to his court historian Procopius, contracted the disease and recovered in 542, at the height of the epidemic which killed about a fifth of the population in the imperial capital Constantinople. The contagion arrived in Roman Egypt in 541, spread around the Mediterranean Sea until 544, and persisted in Northern Europe and the Arabian Peninsula until 549. By 543, the plague had spread to every corner of Justinian's empire.

The plague's severity and impact remain debated. Some scholars assert that as the first episode of the first plague pandemic, it had profound economic, social, and political effects across Europe and the Near East and cultural and religious impact on Eastern Roman society.However, scholars such as Mordechai and Eisenberg have argued that the Plague of Justinian was overstated by primary sources and while would have been incredibly impactful on a personal level, did not have a severe or even a long lasting impact on the population of the Mediterranean in the Age of Justinian.

In 2013, researchers confirmed earlier speculation that the cause of the plague of Justinian was Yersinia pestis, the same bacterium responsible for the Black Death (1346–1353). Ancient and modern Yersinia pestis strains are closely related to the ancestor of the Justinian plague strain that has been found in the Tian Shan, a system of mountain ranges on the borders of Kyrgyzstan, Kazakhstan, and China, suggesting that the Justinian plague originated in or near that region. However, there would appear to be no mention of bubonic plague in China until the year 610.

The Byzantine historian Procopius first reported the epidemic in 541 from the port of Pelusium, near Suez in Egypt. Two other first-hand reports of the plague's ravages were by the Syriac church historian John of Ephesus and by Evagrius Scholasticus, who was a child in Antioch at the time and later became a church historian. Evagrius was afflicted with the buboes associated with the disease, but survived. During the disease's four returns in his lifetime, he lost his wife, a daughter and her child, other children, most of his servants, and people from his country estate.

According to contemporary sources, the outbreak in Constantinople was thought to have been carried to the city by infected rats on grain ships arriving from Egypt. The Romans in Byzantium imported a significant amount of grain from Egypt, where rats and fleas potentially affected by y. pestis were a significant pest control issue.

Procopius, in a passage closely modelled on Thucydides, recorded that at its peak the plague was killing 10,000 people in Constantinople daily, but the accuracy of the figure is in question, and the true number will probably never be known. He noted that because there was no room to bury the dead, bodies were left stacked in the open, funeral rites were often left unattended to, and the entire city smelled like the dead. Given such circumstances, it is highly probable that a sudden increase in mortality rates may not have been as accurately recorded, hence why the overall death toll is based on an estimate.

In Procopius' Secret History, he records the devastation in the countryside and reports the ruthless response by the hard-pressed Justinian:

When pestilence swept through the whole known world and notably the Roman Empire, wiping out most of the farming community and of necessity leaving a trail of desolation in its wake, Justinian showed no mercy towards the ruined freeholders. Even then, he did not refrain from demanding the annual tax, not only the amount at which he assessed each individual, but also the amount for which his deceased neighbors were liable.