The Calvinists demanded recognition of their rights. This conflict was one of the religious factors that contributed to the uprising of the war. During the Bohemian Period that took place from 1618 to 1625, the Bohemian Diet elected Ferdinand of Styria the king of Bohemia in 1617. Two years later, Ferdinand, a member of the Hapsburg family, was elected emperor of the Holy Roman Empire, naming him as Ferdinand II. As a supporter of Catholicism, Ferdinand’s election “alarmed Bohemian Calvinists, who feared the loss of their religious rights.” In May 1618, a Calvinist revolt began when rebels of the group “threw two Catholic members of the Bohemian royal council from a window some seventy feet above the ground.” This incident became known as the Defenestration of Prague. From the beginning, conflicts increased due to the religious outcome that made the Calvinists very furious with King Ferdinand II’s election regarding the Catholics and Lutherans. The emperor then won the support of Maximilian I of Bavaria, the leader of the Catholic