Biographical films, or biopics, depict the lives (or segments thereof) of past and present eminent, famous, and infamous people. The biopic distinguishes itself by emphasizing the person rather than a history of an era, at least in its title. The biography movie bases its claims to authenticity on research—written histories of a period, biographies, diaries, journals, paintings, architecture, fashion—often relying on and crediting the work of historical advisers.