An extened metaphor, also called a conceit, is a metaphor that continues into the sentences that follow. An extended metaphor is also a metaphor developed at great length, occurring frequently in or throughout a work. Extended metaphors are especially effective in poems and fiction. Western usage of extended metaphors is thought to have originally been a product of the Renaissance. (However, the comedies of Aristophanes, written 2000 years ago, often make use of extended metaphors. For example, in his play The Acharnians, the hero Dicaeopolis is poured some wine symbolising Peace into his wine-flask, and keeps it for the rest of the play, refusing to share any of it with most of those who ask him for some.