The Papal Bull “Inter Caetera: Doctrine of Discovery, 1493

A primary source by Pope Alexander VI

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Pope Alexander VI's Demarcation Bull, May 4, 1493. (Gilder Lehrman Collection)

The Papal Bull “Inter Caetera,” issued by Pope Alexander VI on May 4, 1493, played a central role in the Spanish conquest of the New World. The document supported Spain’s strategy to ensure its exclusive right to the lands discovered by Columbus the previous year. It established a demarcation line one hundred leagues west of the Azores and Cape Verde Islands and assigned Spain the exclusive right to acquire territorial possessions and to trade in all lands west of that line. All others were forbidden to approach the lands west of the line without special license from the rulers of Spain. This effectively gave Spain a monopoly on the lands in the New World.

 The Bull stated that any land not inhabited by Christians was available to be “discovered,” claimed, and exploited by Christian rulers and declared that “the Catholic faith and the Christian religion be exalted and be everywhere increased and spread, that the health of souls be cared for and that barbarous nations be overthrown and brought to the faith itself.” This “Doctrine of Discovery” became the basis of all European claims in the Americas as well as the foundation for the United States’ western expansion. In the US Supreme Court in the 1823 case Johnson v. McIntosh, Chief Justice John Marshall’s opinion in the unanimous decision held “that the principle of discovery gave European nations an absolute right to New World lands.” In essence, American Indians had only a right of occupancy, which could be abolished.

The Bull Inter Caetera made headlines again throughout the 1990s and in 2000, when many Catholics petitioned Pope John Paul II to formally revoke it and recognize the human rights of indigenous “non-Christian peoples.”

 Excerpt

Wherefore, as becomes Catholic kings and princes, after earnest consideration of all matters, especially of the rise and spread of the Catholic faith, as was the fashion of your ancestors, kings of renowned memory, you have purposed with the favor of divine clemency to bring under your sway the said mainlands and islands with their residents and inhabitants and to bring them to the Catholic faith. Hence, heartily commending in the Lord this your holy and praiseworthy purpose, and desirous that it be duly accomplished, and that the name of our Savior be carried into those regions, we exhort you very earnestly in the Lord and by your reception of holy baptism, whereby you are bound to our apostolic commands, and by the bowels of the mercy of our Lord Jesus Christ, enjoy strictly, that inasmuch as with eager zeal for the true faith you design to equip and despatch this expedition, you purpose also, as is your duty, to lead the peoples dwelling in those islands and countries to embrace the Christian religion; nor at any time let dangers or hardships deter you therefrom, with the stout hope and trust in your hearts that Almighty God will further your undertakings.



With this proviso however that none of the islands and mainlands, found and to be found, discovered and to be discovered, beyond that said line towards the west and south, be in the actual possession of any Christian king or prince up to the birthday of our Lord Jesus Christ just past from which the present year one thousand four hundred ninety-three begins. And we make, appoint, and depute you and your said heirs and successors lords of them with full and free power, authority, and jurisdiction of every kind; with this proviso however, that by this our gift, grant, and assignment no right acquired by any Christian prince, who may be in actual possesssion of said islands and mainlands prior to the said birthday of our Lord Jesus Christ, is hereby to be understood to be withdrawn or taking away.

Moreover we command you in virtue of holy obedience that, employing all due diligence in the premises, as you also promise—nor do we doubt your compliance therein in accordance with your loyalty and royal greatness of spirit—you should appoint to the aforesaid mainlands and islands worthy, God-fearing, learned, skilled, and expeienced men, in order to instruct the aforesaid inhabitants and residents in the Catholic faith and train them in good morals. Furthermore, under penalty of excommunication “late sententie” to be incurred “ipso facto,” should anyone thus contravene, we strictly forbid all persons of whatsoever rank, even imperial and royal, or of whatsoever estate, degree, order, or condition, to dare without your special permit or that of your aforesaid heirs and successors, to go for the purpose of trade or any other reason to the islands or mainlands, found and to be found, discovered and to be discovered, towards the west and south, by drawing and establishing a line from the Arctic pole to the Antarctic pole, no matter whether the mainlands and islands, found and to be found, lie in the direction of India or toward any other quarter whatsoever, the said line to be distant one hundred leagues towards the west and south, as is aforesaid, from any of the islands commonly known as the Azores and Cape Verde; apostolic constitutions and ordinances and other decrees whatsoever to the contrary notwithstanding.

We trust in Him from whom empires and governments and all good things proceed, that, should you, with the Lord’s guidance, pursue this holy and praiseworthy undertaking, in a short while your hardships and endeavors will attain the most felicitious result, to the happiness and glory of all Christendom.

And, in order that you may enter upon so great an undertaking with greater readiness and heartiness endowed with benefit of our apostolic favor, we, of our own accord, not at your instance nor the request of anyone else in your regard, but out of our own sole largess and certain knowledge and out of the fullness of our apostolic power, by the authority of Almighty God conferred upon us in blessed Peter and of the vicarship of Jesus Christ, which we hold on earth, do by tenor of these presents, should any of said islands have been found by your envoys and captains, give, grant, and assign to you and your heirs and successors, kings of Castile and Leon, forever, together with all their dominions, cities, camps, places, and villages, and all rights, jurisdictions, and appurtenances, all islands and mainlands found and to be found, discovered and to be discovered towards the west and south, by drawing and establishing a line from the Arctic pole, namely the north, to the Antarctic pole, namely the south, no matter whether the said mainlands and islands are found and to be found in the direction of India or towards any other quarter, the said line to be distant one hundred leagues towards the west and south from any of the islands commonly known as the Azores and Cape Verde.