a French prelate, was born at Paris, March 4, 1658. In 1698 he was appointed archbishop of Aries, and in 1710 he succeeded the famous Le Tellier in the archbishopric of Rheims. Mailly distinguished himself by his ardent zeal for the Roman see. When the bull Unigenitus was promulgated, he forced it upon his clergy. His pastoral epistles were often suppressed by the parliament. Pope Clement XI, in consideration of his great services, made Mailly cardinal without consulting first the court of France, and the latter forbade the archbishop to wear the insignia of his new dignity. But these prohibitory measures were not always carried out, and Louis XV allowed him to wear the cardinal's hat. Mailly died in the abbey of St. Thierry, September 13, 1721. See Lichtenberger, Encyclop. des Sciences Religieuses, s.v. (B.P.)