"The Masque of the Red Death" (originally published as "The Mask of the Red Death: A Fantasy") is a short story by American writer Edgar Allan Poe, first published in 1842. The story follows Prince Prospero's attempts to avoid a dangerous plague, known as the Red Death, by hiding in his abbey. He, along with many other wealthy nobles, hosts a masquerade ball in seven rooms of the abbey, each decorated with a different color. In the midst of their revelry, a mysterious figure disguised as a Red Death victim enters and makes his way through each of the rooms. Prospero dies after confronting this stranger, whose "costume" proves to contain nothing tangible inside it. The guests also die in turn.

The story takes place at a castellated abbey of the "happy and dauntless and sagacious" Prince Prospero. Prospero and 1,000 "hale and light-hearted" other nobles have taken refuge in this walled abbey to escape the Red Death, a terrible plague with gruesome symptoms that has swept over the land. Victims are overcome by "sharp pains", "sudden dizziness", and "profuse bleeding at the pores", and die within half an hour. Prospero and his court are indifferent to the sufferings of the population at large. They intend to await the end of the plague in luxury and safety behind the walls of their secure refuge, having welded the doors shut to ensure no one enters or leaves.