Spread of the Bubonic Plague in Europe

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Everything seemed to stop when the world shut down during the COVID-19 pandemic. The streets were deserted. hospitals that are overcrowded. the anxiety that permeates our everyday lives. We tracked the virus’s spread using dashboards and maps, with every new hotspot adding to the disruption of everyday life.

After surviving that experience, maps of past pandemics catch my attention in a new way. I now look at them not just as historical records, but as windows into human suffering, resilience, and uncertainty. They make me wonder: how did people centuries ago face something even more deadly, with no understanding of microbes or modern medicine?

The Black Death was the deadliest pandemic in human history. It was caused by the bacterium *Yersinia pestis*, most often transmitted by fleas that lived on black rats. The disease originated in Central Asia, and according to most researchers, it spread westward along trade routes — carried by merchants, soldiers, and travelers on ships and caravans.

In 1346, the plague reached the Crimean port city of Kaffa (now Feodosia), then part of a Genoese trading network. From there, it made the leap to Constantinople, Sicily, and across the Mediterranean. Within just a few years, it had swept through nearly all of Europe.

By 1351, the death toll was staggering. It’s estimated that between 75 and 200 million people died worldwide (25 to 50 million people in Europe), with up to 60% of Europe’s population perishing. Some cities lost nearly everyone. The social and economic aftershocks lasted for generations.

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