In Switzerland, the second civil war of religion is ended by the
Peace of Kappel. This allows each canton and each district to have
the right to worship as they choose. The result of this peace
settlement is that the Swiss Confederation becomes divided into
Protestant areas (notably Zurich, Berne, Geneva and Basle) and
Catholic ones (notably Lucerne, Zug and Freiburg).
Citation:
Editors. "The Peace of Kappel creates Catholic and Protestant areas of Switzerland".
The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14477, accessed 25 May 2013.]