Editors. "German diet in Cologne undertakes further imperial reorganisation". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14179, accessed 07 December 2013.]
After a failed meeting at Trier in April, the German diet re-assembles in Cologne to grapple with the reorganisation of the Empire. They increase the number of the administrative 'circles' which had been established in 1500, and form an 'Aulic Council' (supreme court) under the control of the Emperor.