Editors. "Emperor Charles V prohibits the proposed German synod at Speyer". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14334, accessed 20 May 2013.]
A German synod was planned to meet at Speyer, but now the Holy Roman Emperor Charles V forbids it from going ahead.