A lost work is a document, literary work, or piece of multimedia produced some time in the past, of which no surviving copies are known to exist. This term most commonly applies to works from the classical world, although it is increasingly used in relation to modern works. A work may be lost to history through the destruction of an original manuscript and all later copies. In contrast to lost or "extinct" works, surviving copies may be referred to as "extant". Deliberate destruction of works may be termed literary crime or literary vandalism (see book burning).