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Pieter Bruegel's "The Triumph of Death"
Hell on Earth, the nightmare depicted by Flemish painter Pieter Bruegel in his mid-16th-century "The Triumph of Death" reflects the social upheaval and terror that followed the plague that devastated medieval Europe. Thought by most to be a scourge of the past, the bacteria of the plague still appears from time to time and has even been researched as a biological weapon by some countries.
Image courtesy Museo del Prado, Madrid

Plague

See pictures of plague victims, treatment, and prevention from National Geographic.