7 years after stepping down, Benedict fuels '2 popes' headache
All Popes of the Catholic Church | St Peter - Pope Francis - YouTube
A History of the Popes: From Peter to the Present - 9781580512282
How Many Popes Were Murdered? The Little-Known History of Papal Assassinations -
Up to and including Francis, how many popes have there been altogether? | globalquiz.org
Queen Elizabeth II and the many popes she's met during her long reign
How many popes are there now?
The extraordinary skill shared by popes past and present
All Popes of the Catholic Church: St Peter - Francis - YouTube
The Queen's Papal Meetings Through the Years Photos - ABC News
Queen Elizabeth met five popes in her lifetime | Catholic News Agency
The Two Popes” Gives Way to Pope vs. Pope on the Issue of Celibacy in the Priesthood | The New Yorker
Has there ever been a black or African pope?
The extraordinary year of three popes in 1978 - BBC News
Dueling Popes? Maybe. Dueling Views in a Divided Church? Definitely. - The New York Times
The Day of Four Popes
Full text of Pope's in-flight interview from Manila to Rome | Catholic News Agency
Popes of the Catholic Church | USCCB
A look at popes and their encyclicals | Pew Research Center
Who rules in Rome: Pope Francis or the Roman Curia? A papal blueprint faces red tape
Papal saints: Once a given, now extremely rare | Pew Research Center
Every Pope ever: the full list | News | theguardian.com
