Born Jan. 3, 1849, in Nimes; died Jan. 4, 1921, in Paris. French Slavist and historian. Specialist on the history of Czechoslovakia. Professor at the universities of Grenoble (1881–86) and Bordeaux (1886–90). In 1896 he became a professor at the Sorbonne.
During World War I (1914–18), Denis supported Czechoslovak bourgeois emigration. He worked with T. G. Masaryk. In 1915 he began to publish the magazine La Nation tchéque, in which he for the creation of a Czech bourgeois state. In 1920 he founded the Institute of Slavic Studies at the University of Paris. Denis’ main works are devoted to the history of Bohemia in the 15th to 17th century.