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Lionel Casson (July 22, 1914 – July 18, 2009) was a classicist, professor emeritus at New York University, and a specialist in maritime history. He earned his B.A. in 1934 at New York University, and in 1936 became an assistant professor. He later earned his Ph.D. there during 1939. In 2005 he was awarded the Archaeological Institute of America Gold Medal.