Answer:
For the particular case of the Kings of Spain and Portugal in exchange for their support of evangelization and the establishment of the Catholic Church in America and Asia. It was derived from the papal bulls Romanus Pontifex (1455) and Inter caetera (1493), granted for the benefit of Portugal on its Atlantic routes, and the so-called Alexandrian Bulls issued in 1493, immediately after the voyage of Christopher Columbus at the request of the Catholic Monarchs. The royal or Indian patronage for the Spanish Crown was confirmed by Pope Julius II in 1508. Religious teaching to the Indians was benefited by the bishoprics.
Earlier, on December 13, 1486, Pope Innocent VIII had granted the Queen of Castile and her husband, the King of Aragon, at their request, the perpetual patronage of the Canary Islands and Puerto Real including also Granada, foreseeing their next conquest. This was stipulated with the bull Ortodoxae fidei. However, it was not until 1505 that the monarchs asked the pope for the full prerogatives of the patronage in the discovered areas and in the Spanish territory under his rule. And only in 1523, Pope Adrian VI granted them.
Explanation:
