This handout picture released by the Vatican press office shows Pope Francis and Sheikh Ahmed al-Tayeb (R), the Grand Imam of Al-Azhar, at the Sunni institution in Cairo as part of a two-days visit in Egypt, on April 28, 2017. Pope Francis began a visit to Egypt to promote "unity and fraternity" among Muslims and the embattled Christian minority that has suffered a series of jihadist attacks. - RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / OSSERVATORE ROMANO" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS / AFP / OSSERVATORE ROMANO / HO / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / OSSERVATORE ROMANO" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS