Martin Luther's posting of his 95 Theses criticizing the Catholic Church's sale of indulgences sparked the Protestant Reformation. Luther's religious revolt spread Protestantism across Germany and northern Europe. King Henry VIII established the Church of England after the Pope refused to annul his marriage, making England a Protestant nation. John Calvin further developed Protestant theology, believing in predestination and establishing a theocracy in Geneva. The Reformation divided Western Christianity between Catholics and Protestants.