Holy Roman Emperor Ferdinand III holds a Diet of Ratisbon, which
confirms the arrangements detailed by the 1648 Peace of Westphalia.
Citation:
Editors. "Diet of Ratisbon confirms the Peace of Westphalia".
The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16379, accessed 20 May 2013.]