2 But there is, besides, another reason, a unique one, why We consider that this immortal achievement should be recalled by Us with memorial words. For Columbus is ours; since if a little consideration be given to the particular reason of his design in exploring the mare tenebrosum , and also the manner in which he endeavoured to execute the design, it is indubitable that the Catholic faith was the strongest motive for the inception and prosecution of the design; so that for this reason also the whole human race owes not a little to the Church.
Source: Quarto Abeunte Saeculo (Vatican.va)