The Defenestration of Prague refers to two historical events in which individuals were thrown out of a window, significantly impacting Czech history. The most famous incident occurred in 1618 when Protestant nobles tossed two Catholic officials from the window of Prague Castle. This act was a protest against the Habsburgs' attempts to impose Catholicism in a predominantly Protestant region, igniting the Thirty Years' War. The first defenestration took place in 1419, when a group of Hussites, followers of reformer Jan Hus, threw several city council members out of a window in Prague. This event marked the beginning of the Hussite Wars, a series of conflicts driven by religious and social tensions in Bohemia.