[This bull, called _Precelse denotionis_, confirms and extends certain bulls of Leo X's predecessors, Nicholas V and Sixtus IV, reciting the bulls so confirmed and extended--two of the former and one of the latter. In the first bull, _Dum diversas_, authority is granted to King Alfonso V of Portugal to make war upon the infidels, to conquer their lands, and to reduce them to slavery. It concedes also plenary indulgence for their sins to all taking part in the expeditions against the Moors, or aiding the expeditions with gifts. [166] Its date is June 18, 1452. The second bull is dated January 8, 1454, and is called _Romanus Pontifex._ In it Nicholas "after reviewing with praise the zeal of Prince Henry in making discoveries and his desire to find a route to southern and eastern shores even to the Indians, granted to King Alfonso all that had been or should be discovered south of Cape Bojador and Cape Non toward Guinea and 'ultra versus illam meridionalem plagam' as a perpetual possession." [167] The third bull, the _Eterni Regis_ of June 21, 1481, confirms that of Nicholas V. It "granted to the Portuguese Order of Jesus Christ [168] spiritual jurisdiction in all lands acquired from Cape Bojador 'ad Indos.'" This bull also contained and sanctioned the treaty of 1480 between Spain and Portugal, by which the exclusive right of navigating and of making discoveries along the coast of Africa, with the possession of all the known islands of the Atlantic except the Canaries, was solemnly conceded to Portugal. [169] After thus reciting these bulls ("of our own accord ... approve, renew, and confirm the aforesaid instruments" [170]) Pope Leo extends and amplifies them in the following words:]