Jan Hus was a Czech priest and philosopher at Prague's Charles University who challenged Catholic Church corruption in the early 1400s, inspired by English reformer John Wycliffe. Teaching in Czech rather than Latin and translating Scripture for common people, Hus condemned the sale of indulgences and argued the Bible's authority superseded papal power. In 1414, Holy Roman Emperor Sigismund summoned him to the Council of Constance with a promise of safe conduct, but church officials arrested and