The site had once been a medieval hospital and cemetery. Underneath a supermarket in the middle of Paris, 200 skeletons are buried head to toe, six corpses deep. The supermarket allowed in researchers to examine during construction. It seems that The plague and smallpox are the probably causes of death, as it was the plague and smallpox that dispatched tens of thousands of Parisians throughout the Dark Ages.
The French National Institute for Preventive Archaeological Research plans to perform tests to determine what exactly killed the people. Whatever it was, it killed with speed. And researchers were surprised to observe the meticulousness with which the bodies were placed in the graves.