Editors. "Protestants in the Imperial Diet are condemned". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15535, accessed 22 May 2013.]
Holy Roman Emperor turns Rudolf II turns against the Protestant princes, placing the ban of the Empire on members of the Protestant minority in the Diet who refuse to accept majority decisions. At the same time, Catholicism is re-introduced in Aachen by force.