In 2013 at the Rodewisch Clinic for Psychiatry, four folders were found that contain original documents from the office of former head of the clinic Rolf Walther. These original sources provide new insights into the organisational background of the International Symposium on Psychiatric Rehabilitation of 1963, as a result of which the groundbreaking Rodewisch Propositions were framed. The documents founds reveal that, apart from the persons already identified, Halle/Saale - based hygienist Karlheinz Renker was deeply involved in the preparation of this event. They also show that for ideological reasons the GDR Ministry of Health restricted the number of participants from non-socialist countries, in particular Western Germany, to be admitted. Finally, the sources suggest that a volume compiling all talks given at the symposium as one publication and as such making its content and resolutions known to a wider public failed, among other reasons, due to the fact that Karl Leonhard, then head of the GDR Association for Psychiatry and Neurology, was "not interested" in it.