A historian may refer to any person who is involved in the study of history of a particular period of time or any other kind of social phenomenon that has occurred in the past. Historians are regarded as the authority in affairs related to history and they may be involved in many kinds of research activities of past events. In the late 19th century, the profession of a historian became one of the established professions, after many universities were delving into research work. It is very important for a historian to treat all the facts that he procures with a certain degree of objectivity and consider counter evidences that he comes across. Historians hold a significant and important position in the society as they play the role of telling the world the truth. Historians may also be involved in the research of already established facts to ascertain truth or provide other sources of information. The job of a historian is versatile and dynamic one as their work can provide many pieces of information that is hitherto unknown to the world. This collection of biographies with trivia, interesting facts, timeline and life history will provide detailed information on famous historians.