What was the significance of the year 1347?

The year 1347 is significant because it marked the onset of the Black Death, one of the deadliest pandemics in human history. The plague, caused by the bacterium Yersinia pestis, began spreading from Asia to Europe, leading to the deaths of an estimated 25 million people, or about one-third of Europe's population at the time. This catastrophic event had profound social, economic, and cultural impacts, reshaping European society and contributing to the end of the feudal system. The pandemic also spurred advancements in medicine and public health practices in the following centuries.