The last Grandmaster of the Teutonic knights, who being "religious in an eminent degree and shaken in his belief" took zealously to Protestantism and came under the influence of Luther, who advised him to declare himself Duke of Prussia, under the wing of Sigismund of Poland, in defiance of the Teutonic order as no longer worthy of bed and board on the earth, and so doing, became founder of the Prussian State (1490-1568).