 The defense was chaired by Martin Luther (only 13 defenses were chaired by Luther himself during the last decade of his life) and likely Philip Melanchthon acted as a doctoral advisor.Rapolionis thesis "Die poenitentia" (On Repentance) about good deeds and their impact on the judgement was inspired by the Diet of Regensburg (1541).The defense protocol was written by and spread in Lutheran centers (a copy is preserved by the Academic Library of the University of Latvia).