FREDERICK II. (1482-1556), elector palatine, surnamed the Wise, fourth son of Philip the Noble-minded, was born in 1482, and succeeded his brother Louis as elector in 1544. During the siege of Vienna by Sultan Soliman in 1529, he held the command of the army of the empire. In 1535 he married Dorothea daughter of Christian II., ex-king of Denmark. Through the persuasion of Melanchthon he embraced the principles of the Reformation and joined the Smalkald League, but he afterwards signed the Augsburg Interim, and became reconciled with Charles V. He died in 1550.