The Psychomachia is a poem by the Late Antique Latin poet Prudentius, from the early fifth century AD. It has been considered to be the first and most influential "pure" medieval allegory, the first in a long tradition of works as diverse as the Romance of the Rose, Everyman and Piers Plowman; however, a manuscript discovered in 1931 of a speech by the second-century academic skeptic philosopher Favorinus employs psychomachia, suggesting that he may have invented the technique. Wikipedia