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This picture taken on April 21, 2014 shows postcards depicting Pope John XXIII (L) and Pope John Paul II sold in a shop in central Rome. Pope Francis aims to unite conservative and reformist strands of Catholicism with the first canonisation of two popes this month — an impressive coup de theatre that has already stirred dissent in some quarters. Conferring sainthood on John XXIII and John Paul II means bringing together two distinct schools of thought on what a pope should be — a humble parish priest figure or a globetrotting, charismatic superstar. AFP PHOTO / TIZIANA FABI