3 But if your countries have reason to venerate this saintly man and to recall his great achievements at this happy commemoration, much more so has this Apostolic See. Three times he undertook the long and arduous journey to Rome as a pious pilgrim, to kneel in reverence before the tomb of the Prince of the Apostles. Here also, with filial respect, he besought from Our predecessors, the mission which he so ardently desired of preaching Our Divine Redeemer's name to remote and barbarous tribes, and of bringing Christian civilization to them.
Source: Ecclesiae Fastos (Vatican.va)