In the performing arts, a period piece is a work set in a particular era. This informal term covers all countries, all periods and all genres. It may be as long and general as the medieval era or as limited as one decade, the Roaring Twenties, for example. A genre is a division of a particular form of art according to criteria particular to that form. ... The Middle Ages formed the middle period in a traditional schematic division of European history into three ages: the classical civilization of Antiquity, the Middle Ages, and modern times, beginning with the Renaissance. ... It has been suggested that Roaring Twenties be merged into this article or section. ...