Indulgences became increasingly popular in the Middle Ages as a reward for displaying piety and doing good deeds . . . . With the permission of the church, indu

Indulgences became increasingly popular in the Middle Ages as a reward for displaying piety and doing good deeds . . . . With the permission of the church, indulgences also became a way for Catholic rulers to fund expensive projects, such as Crusades and cathedrals, by keeping a significant portion of the money raised from indulgences in their lands. https://en.wikipedia.org/wiki/Indulgence#Early_and_medieval_beliefs https://en.wikipedia.org/wiki/Indulgence#Early_and_medieval_...