Elected bishop of Noyon in 1240, Pierre accompanied Louis IX of France on the Seventh Crusade.
[1] Pierre was given a dispensation, owing to his illegitimate birth, from Pope Honorius III which allowed him to hold ecclesiastical benefices.
[7] In 1240, Pierre and John, the dean of St. Martin of Tours, both received the same number of votes in the election for bishop of Noyon.
[8] The decision, drew letters of complaint from Pope Gregory IX to the archbishop of Reims, chapter of Namur, and the bishop of Palestrina.
[9] Pierre accompanied his nephew, King Louis IX, on the Seventh Crusade to the Holy Land,[10] and died near Cyprus in 1249 and was buried in the cathedral of Noyon.