Editors. "Pope Leo X demands a five-year peace in Christendom". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14239, accessed 18 May 2013.]
Pope Leo X publishes a bull calling for a five-year peace in Christendom, and for the European powers instead to pour their military energies into a crusade against the Turks.