How did Roman Catholicism spread through the Andes after the Spanish conquest?

Following the Spanish conquest of the Inca civilization, the spread of Roman Catholicism throughout the Andes was driven by the Spanish crown's commitment to converting the Indigenous peoples of the Americas.12

The primary agents of this transition were religious orders, including the Franciscans, Dominicans, Augustinians, and Jesuits. These clergy members accompanied Spanish expeditions and systematically imposed the new faith by constructing churches and religious shrines directly upon the sites of former Inca temples.12

The process of indoctrination involved establishing patron saint festivals in villages to integrate the population into Catholic life. However, the resulting religious landscape became highly syncretic. Because the Indigenous people often blended traditional, pre-conquest beliefs—such as the worship of nature and local divinities—with Catholic rituals, the practice of the faith in the region developed into a unique, tradition-rich hybrid. While some clergy, such as Bartolomé de Las Casas, advocated for the humane treatment of Indigenous populations, the imposition of Catholicism remained a central pillar of colonial rule.231