Wenceslaus IV of Bohemia

Wenceslaus IV initially supported Jan Hus and the reform movement, but later opposed them under pressure from the Catholic Church. His inconsistent policies alienated both Hussites and Catholics, weakening his authority.

Wenceslaus IV's refusal to release Hussite prisoners led to a mob storming the New Town Hall in Prague. The crowd threw the city councillors out of a window, triggering the Hussite Wars that would devastate Bohemia for decades.

Wenceslaus IV died of a heart attack shortly after the Defenestration of Prague. His death left Bohemia without a strong ruler, allowing the Hussite movement to gain momentum and plunging the kingdom into civil war.