Pope Gregory IX — Photo Credit: By Raphael - http://www.2artgallery.com/gallery/gregory-ix-approving-the-decretals-1511-by-raphael-p-5638.html?osCsid=ac17d37966aa52b020eb8f8e86d9f940, Public Domain, https://commons.wikimedia.org/w/index.php?curid=14726944
