Giacomo Gianiel (in religious life, Giacomo di San Luigi) was a professed religious of the Congregation of the Passion of Jesus Christ.

He lived his short life in seclusion, but this does not prevent us from recognizing his sanctity. His charity towards the sick was well-known. He acted “more than as a mother would by serving them, showing them compassion, assisting them day and night with a charity so loving and ingenious that a mother would not have been able to do more than what he did”. He deprived himself of food in order to give it to the poor who knocked at the door of the retreat.

He was declared Venerable in 1989.