Indulgences:
Indulges were deeds that could be bought through the church to go yo Heaven that was a relaxation of penalties fora sins the buyer had committed, which was only a common fundraiser of the church to raise money.

Purgatory
A purgatory was a place where souls were souls went after death, the middle ground between Heaven and 'the underworld'. Souls were punished here for their sins that were committed during its lifespan and entered Heaven after it had 'paid'. This was only taught in Catholic teachings.

Jesuits:
The Jesuits were the religious order created to serve the pop and the church. This was created by Ignatius of Loyola, a Spanish nobel, made the first founded order in 1534. He was apart Catholic Reformers that wanted different and newer ruling.