Philibert de Montjeu, a Burgundian noble, was canon of Amiens and later Bishop of Coutances by the protection of the dukes of Burgundy and Bedford.

On June 4, 1427, we find a petition of Philibert's to the treasury to deliver to him the income rendered to the See by the barony of Saint Sauveur Lendelin. At the end of 1431 Philibert went to the Council of Bâle where he played a very important role. In 1433 he was called to Bohemia where he stayed for three years, working toward the reunion of that country with the Church.

He presided at the sixth session which proclaimed the Pope contumacious.

He was a very zealous Burgundian. On June 29, 1428, Henry VI ordered that his , expenses be paid on a trip from the country of Cotentin to Paris to the Duke of Bedford and the Council "for the good and profit and usefulness to the country in the expulsion of the brigands and enemies of the said lord who were in it."

On' July 14 Philibert de Montjeu and Enguerrand de Champrond gave a receipt to Pierre Surreau, receiver-general of Normandy, for the sum Of 225 livres on account Of 450 livres which was owed them for this mission of forty-seven days. The opinion that he gave at Constance concerning the Maid was expressed in the harshest terms.

We know also that Philibert de Montjeu was procédurier and that he proved himself to be very rigorous, with Jean Graverent, in the prosecution of Jean Le Couvreur, a burgess of Saint Lô suspected of heresy, who demanded appeals to take his case before the Pope.

In 1440, forbidden by illness to conduct a trial, he commissioned Pierre Cauchon, Bishop of Lisieux, to take his place, and André Marguerie, archdeacon of Petit Caux, and Robert Le Barbier, canon of Rouen, all of them judges of the Maid and his good friends.

It is interesting to note that the See of Coutances was the last religious rampart of the Anglo-Burgundian fanatics, more so than even the See of Lisieux. Philibert de Montjeu was succeeded as bishop by the harsh Gilles de Duremort (1439-1453), and by the lettered, scornful Zanon de Castiglione (11444-1453).

Richard de Longueil succeeded all these enemies of Jeanne and the King of France and worked toward her rehabilitation.