The Apology of the Augsburg Confession was written by Philipp Melanchthon during and after the 1530 Diet of Augsburg as a response to the Pontifical Confutation of the Augsburg Confession, Charles V's commissioned official Roman Catholic response to the Lutheran Augsburg Confession of June 25, 1530. It was intended to be a defense of the Augsburg Confession and a refutation of the Confutation.