VATICAN CITY, VATICAN - September 15, 2016: HH Sheikh Mohamed bin Zayed Al Nahyan, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces (L), bids farewell to His Holiness Pope Francis, Bishop of Rome (R), after a meeting in the Papal Library at the Apostolic Palace. 
( Ryan Carter / Crown Prince Court - Abu Dhabi ) *** Local Caption ***  20160915RC_C164743.jpg
Sheikh Mohamed bin Zayed, Crown Prince of Abu Dhabi, meets Pope Francis at the Vatican’s Apostolic Palace in 2016. Crown Prince Court – Abu Dhabi

Islam and Christianity: a long, complex and crucial relationship