After the conquest, the Spanish crown focused on the Catholic indoctrination of the natives. Human settlements founded by royal missionaries in the New World were called "Indian doctrines" or simply "doctrines". Originally, friars had only temporary missions: teach the Catholic faith to the natives, and then transfer the settlements to secular parishes, just like the ones that existed in Spain at the time; the friars were supposed to teach Spanish and Catholicism to the natives. And when the natives were ready, they could start living in parishes and contribute with mandatory tithing, just like the people in Spain.