Editors. "Rumours of a Catholic conspiracy alarm Philip of Hesse". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14380, accessed 11 December 2013.]
A meeting at Breslau between Catholic rulers Elector Joachim of Brandenburg, Duke George of Saxony and the Archduke Ferdinand stimulates rumours of a Catholic conspiracy. This is a particular cause for alarm for their Protestant antagonist Philip, Landgrave of Hesse.