An official history is a work of history which is sponsored, authorised or endorsed by its subject. The term is most commonly used for histories which are produced for a government. The term also applies to commissions from non-state bodies including histories of commercial companies. An official biography (one written with the permission, cooperation and sometimes the participation of its subject or heirs) is an authorised biography. Official histories frequently have the advantage that the author has had access to archives, been allowed to interview subjects and use other primary sources closed to independent historians. Because of the close relationship between author and subject, such works may be (or be perceived to be) partisan in tone and to lack historical objectivity. Such bias varies and some official histories have been called exercises in propaganda; in other cases the authors have retained a measure of independence. Source: Wikipedia (en)