Catholic church it was and still be the biggest religious organization of all Spain, reaching out tre quarters of the total population.
Around 1480, the Catholic Monarchs established what would be known as the Spanish Inquisition, they intended to maintain Catholic Ortodoxy in their kindoms and territories, that include Canary Islands, The Spanish Netherland, Naples, North Central and South América.
This is how the Catholic Church in America began with the Colonization of the continent, trying to control and influence the life of the new conquered.