Angelo Guiseppe Roncalli 1881-1963, ‘caretaker’ Pope for five critical years. He unexpectedly convened the Second Vatican Council with a view to renewing the Church world-wide.

• http://atheism.about.com/library/glossary/western/bldef_johnxxiii.htm
• http://www.mcs.drexel.edu/~gbrandal/Illum_html/JohnXXIII.html

• http://www.leader-values.com/HistoricalLeaders/detail.asp?Section=Pope%20John%20XXIII

• http://www.vatican.va/holy_father/john_xxiii/biography/index.htm