Editors. "Pope Innocent X condemns Peace of Westphalia". The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16324, accessed 21 April 2014.]
In the bull 'Zelo Domus Dei', Pope Innocent X condemns the Peace of Westphalia. It declares that some clauses of it are disadvantageous to the Catholic religion, since it grants local rulers the power to make Calvinism the established religion of their state.