Son of the public prosecutor of the parlement of Bourgogne, Languet de Gercy was a protégé of Jacques Bénigne Bossuet, who introduced him to Louis XIV and had him named as the chaplain to the princess. At the same time he was the general vicar of the diocese of Autun, which includes the parish of Paray-le-Monial where the saint Marguerite Marie Alacoque is buried.
Languet de Gercy, a protégé of Jacques Bénigne Bossuet, was introduced to Louis XIV and named chaplain for the princess. He also served as general vicar for the diocese of Autun, which includes Paray-le-Monial, where Saint Marguerite Marie Alacoque is buried.