The Black Death

John of Winterthur (d. c. 1348)

John of Winterthur, also known as Johannes Vitoduranus, was a Franciscan friar and chronicler whose account of the Black Death in southern Germany is one of the most important primary sources for the pandemic’s impact on Central Europe. His chronicle, written in Latin, provides a vivid and detailed description of the plague’s arrival, its symptoms, and its social and religious consequences.

Life and Work

John was a Franciscan friar based at the convent of Winterthur in what is now northeastern Switzerland. Little is known of his life beyond what can be inferred from his chronicle. He was an educated man, familiar with the theological and historical literature of his time, and he had access to information about events in the surrounding region through the Franciscan network of convents and through travellers and merchants.

John’s chronicle covers the period from approximately 1340 to 1348, and it was likely left unfinished by his death — possibly from plague — around 1348.

The Account of the Plague

John’s account of the plague is notable for its vivid detail and its emotional power. He described the terror of the population, the failure of medical treatments, and the breakdown of social bonds as families abandoned their sick. He recorded the symptoms of the disease — the buboes, the fever, the rapid progression to death — with clinical precision.

John also described the religious responses to the plague: the processions, the prayers, the Flagellant movement, and the persecution of Jewish communities. His account provides important evidence for the intersection of religious anxiety and social violence during the pandemic.

The Significance of John’s Chronicle

John’s chronicle is one of the few detailed contemporary accounts of the plague in the German-speaking lands. The Rhineland and southern Germany were among the regions most severely affected by the pandemic, and the persecution of Jews was particularly intense in this area. John’s account provides essential evidence for understanding these events.

The chronicle also illustrates the perspective of a Franciscan friar — a member of a mendicant order that was deeply engaged with the urban poor and that had a tradition of social criticism. John’s concern for the suffering of ordinary people and his critical attitude toward the wealthy and powerful reflect the Franciscan tradition of social engagement.