English: Blessed Pierre de Luxembourg (20 July 1369 – 2 July 1387) was a French Catholic prelate who served as the Bishop of Metz, and as a cardinal of the Avignon Obedience from 1384 until his death.

Pierre was descended from nobles who secured his entrance into the priesthood when he started to serve in several places as a canon before he was named as the Bishop of Metz and a Pseudocardinal under by Antipope Clement VII. He was noted for his austerities and successes in diocesan reform as well as for his dedication to the faithful but he tried to end the Western Schism that pitted pope against antipope and rulers against rulers. His efforts were in vain and he was soon driven from Metz but moved to southern France where he died from anorexia as a result of his harsh self-imposed penances.

But both sides in the conflict recognized his deep holiness and his dedication to the people in Metz and elsewhere.There were continual lobbies for him to be beatified and this later materialized when Pope Clement VII beatified him on 9 April 1527 in Rome