After Charles IV there were many arguments and fights in Prague. A priest called Jan Hus said that the Catholic Church had become too powerful. He was arrested and burned at the stake in 1415. A lot of people agreed with what Hus had been saying. These people were called Hussites. They threw a lot of important Catholic people out of the window (called "defenestration"). A lot more fighting followed, and for many years Bohemia was ruled by kings who lived in other countries.