Robert A. Rosenstone is an American author, historian, and Professor Emeritus of history at the California Institute of Technology. He is the leading international scholar in the fast growing field devoted to studying the relationship between history and the visual media. He has written two books on the topic, "Visions of the Past: the Challenge of Film to Our Idea of History", and "History on Film / Film on History", and has edited an influential collections of essays, "Revisioning History: Film and the Construction of a New Past". His most recent addition to the field, "A Blackwell Companion to Historical Film." consists of 25 original essays by scholars from six continents which assess the state of the field worldwide today.