Jean de Vienne (bishop, died 1351)
Jean de Vienne (died 14 June 1351) was a French prelate and diplomat. He served as the bishop of Avranches (as Jean IV) from 1328 until he was transferred to the diocese of Thérouanne (as Jean III) in 1331. He was transferred again in 1334 to the archdiocese of Reims (as Jean II), which he held until his death. Jean twice served the king of France as an ambassador to the Holy See and once as an ambassador to Castile.