Wenceslaus IV of Bohemia
The unrest began after pre-Protestant Christian reformer Jan Hus was executed by the Catholic Church in 1415 for heresy. Because the King Wenceslaus IV of Bohemia had plans to be crowned the Holy Roman Emperor, he suppressed the religion of the Hussites, yet it continued to spread. When King Wenceslaus IV died of natural causes a few years later, the tension stemming from the Hussites grew stronger. In Prague and various other parts of Bohemia, the Catholic Germans living there were forced out.