On April 8, 1933, the Main Office for Press and Propaganda of the German Student Union proclaimed a nationwide "Action against the Un-German Spirit", which was to climax in a literary purge or "cleansing" ("Säuberung") by fire. Local chapters were to supply the press with releases and commissioned articles, sponsor well-known Nazi figures to speak at public gatherings, and negotiate for radio broadcast time. On the 8th of April, the Student Union also drafted the Twelve Theses which deliberately evoked Martin Luther and the historic burning of "Un-German" books at the Wartburg festival on the 300th anniversary of the posting of Luther's Ninety-Five Theses.