"The Masque of the Red Death" 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.

A masquerade ball is a special kind of formal ball which many participants attend in costume wearing masks. Less formal "costume parties" may be a descendant of this tradition. A masquerade ball usually encompasses music and dancing. These nighttime events are used for entertainment and celebrations.