Saints - I

Incorruptibles = These Saints have died and yet their bodies refuse death and decay, at least to some degree. Incorruptibility is often held as one of the ultimate signs of saintly holiness. For more info see this Link here. 
Inquisition = The Inquisition, both the Adept Order and the Institution, are long-time servants to the Church. They work to root out heresy and prosecute crimes of faith. For more info see The Inquisition. 
Investigation of Miracles = The established Church won't just accept stories of miracles, accounts of the miraculous must be investigated. 
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Investiture Controversy = The Investiture Controversy has popped up from time to time down through history. The Order of Priests must vie with outside forces of authority to determine who has jurisdiction over what. For more info see Investiture Controversy.