The map has been published in History National Geographic Magazine Issue 4 .
"IT STARTED WITH SWELLING AND ENDED WITH DEATH. IT KILLED
INDISCRIMINATELY BOTH PRINCES AND PEASANTS. IT TRAVELED
MORE THAN A MILE A DAY, LEAPFROGGING PORTS TO QUICKLY INFECT
ENTIRE COUNTRIES. IN JUST SIX YEARS IT TOOK ONE IN EVERY THREE
EUROPEANS. IT WAS THE PLAGUE THAT CHANGED A CONTINENT."