A retrospective exhibition presents works from an extended period of an artist's activity. Similarly, a retrospective compilation album is assembled from a recording artist's past material, usually their greatest hits. A television or newsstand special about an actor, politician, or other celebrity will present a retrospective of the subject's career highlights. A leading (usually elderly) academic may be honored with a Festschrift, an honorary book of articles or a lecture series relating topically to a retrospective of the honoree's career. Celebrity roasts good-naturedly mock the career of the guest of honor, often in a retrospective format.