Augsburg is one of the oldest cities in Germany and is the third largest city in Bavaria after Munich and Nuremberg. The city flourished during the Reformation and Renaissance. It was in Augsburg that individuals formulated ideas, presented documents, and arrived at decisions for the Imperial Diet. These events had and continue to have a profound significance not only in a religious context but also in terms of culture and history.
Martin Luther visited Augsburg twice: in 1511 while returning to Wittenberg from a pilgrimage to Rome, and again in 1518, when he was interrogated by Cardinal Cajetan about his new doctrine. During this hearing, Luther remained steadfast in his convictions and for the first time declared explicitly that the Bible must be the ultimate ecclesiastical authority. Luther maintained that only the word of God is the source of real truth and freedom.