![Painting of the Defenestration of Prague 1618.](https://www.historynet.com/wp-content/uploads/2023/01/Defenestration-Prague-1618-mh-spring-2023.jpg)
The Thirty Years’ War turned violent with the 1618 Defenestration of Prague, when Bohemian Protestants, weary of power plays by Catholic regents, threw two of them out a third-floor window of the royal palace. (National Gallery of Victoria, Melbourne)
National Gallery of Victoria, Melbourne