Editors. "Catholic and Protestant antagonism in Swiss Cantons". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14419, accessed 23 May 2013.]
In Switzerland, religious tensions develop into institutionalised enmities, when the Catholic Forest Cantons sign a Christian Union with Austria. This creates an antagonism with the Protestant Civic League, comprised of Zurich, Berne, Strasbourg and Constance.