Philip I, Landgrave of Hesse (13 November 1504 – 31 March 1567), nicknamed (in English: "the Magnanimous"), was a German nobleman and champion of the Protestant Reformation, notable for being one of the most important of the early Protestant rulers in Germany. Biography Early life and embracing of Protestantism Philip was the son of Landgrave William II of Hesse and his second wife Anna of Mecklenburg-Schwerin. His father died when Philip was five years old, and in 1514 his mother, after a series of struggles with the Estates of Hesse, succeeded in becoming regent on his behalf. The struggles over authority continued, however. To put an end to them, Philip was declared of age in 1518, his actual assumption of power beginning the following year. The power of the Estates had been broken by his mother, but he owed her little else. His education had been very imperfect, and his moral and religious training had been neglected. Despite all this, he developed rapidly as a statesman, and soon began to take steps to increase his personal authority as a ruler. The first meeting of Philip of Hesse with Martin Luther took place in 1521, at the age of 17, at the Diet of Worms. There he was attracted by Luther's personality, though he had at first little interest in the religious elements of the gathering. Philip embraced Protestantism in 1524 after a personal meeting with the theologian Philipp Melanchthon. He then helped suppress the German Peasants' War by defeating Thomas Müntzer at the Battle of Frankenhausen. Philip refused to be drawn into the anti-Lutheran league of George, Duke of Saxony, in 1525. By his alliance with John, Elector of Saxony, concluded in Gotha on 27 February 1526, he showed that he was already taking steps to organize a protective alliance of all Protestant princes and powers. At the same time, he united political motives with his religious policy. As early as the spring of 1526, he sought to prevent the election of the Catholic Archduke Ferdinand as Holy Roman Emperor. At the Diet of Speyer in the same year, Philip openly championed the Protestant cause, rendering it possible for Protestant preachers to propagate their views while the Diet was in session, and, like his followers, openly disregarding ordinary Roman Catholic ecclesiastical usages. Introduction of the Reformation in Hesse Although there was no strong popular movement for Protestantism in Hesse, Philip