Editors. "Treaty of Monzon between France and Spain". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15943, accessed 19 April 2014.]
France and Spain sign the Treaty of Monzon, confirming the independence of the Grisons and guaranteeing freedom for Catholics to worship in this Protestant-dominated region. The terms of the treaty prohibit Spain from sending troops through the Valtelline.