(c.1372–July 6, 1415), was a professor of philosophy and the rector of the University of Prague, Bohemia. Influenced by John Wycliffe, he insisted on teaching and expounding the Holy Scriptures in the language of the people and inspired a great following, similar to John Wycliffe in England. Amidst great controversy, he was betrayed and martyred. His last words were:
O holy simplicity!17