Ten years ago, Jorge Mario Bergoglio stood on the balcony of St Peter’s in Rome, and said simply to the waiting crowd, “Buono Sera”, and asked them to pray for him. It was the beginning of a pontificate very different from any other. The archbishop of Buonos Aires was to become the first pope to take the name of Francis, the saint of the poor and of nature, and the first pope from Latin America. But it was in style as well as substance that he seemed so different from other successors of Peter.