Alliance of Kloster-Severn is signed between Francis I of France, Bavaria, Saxony and Hesse, to oppose the recognition of Ferdinand as King of the Romans.
Editors. "Francis I, Bavaria, Saxony and Hesse unite against King Ferdinand". The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=9995, accessed 25 May 2015.]