June 25, 1530: Lutherans present their summary of faith, known as Confession of Augsburg, to Emperor Charles V. Philipp Melanchthon did most of the work preparing it, but it was not presented until it received Martin Luther's approval (see issue 39: Luther's Later Years).

June 25, 1580: On the fiftieth anniversary of the Confession of Augsburg, Lutherans publish the Book of Concord, which contains all the official confessions of the Lutheran Church, in German.