Charles Upson Clark (January 14, 1875 in Springfield, Massachusetts[1] –1960) was a professor of history at Columbia University.
He discovered the Barberini Codex, the earliest Aztec writings on herbal medicines extant.
[2] Throughout his life he was the author of many books on a variety of subjects.
Among them was the history of West Indies by Antonio Vázquez de Espinosa translated into English,[3] and the modern history of Romania.
[4] He also collaborated with the American School of Classical Studies in Rome, where he held a directory of Classical Studies and Archaeology since 1910.