Pierre I was a Cistercian monk of the twelfth century, and Bishop of Arras, France from 1184 to 1203.

Pierre is first known as Abbot of Pontigny from 1176 to 1178. Then from the end of 1180, he was Abbot of Cîteaux.Jean Marillier, charters and documents relating to the Abbey of Cîteaux, 1098-1182, (Rome, 1961).

In the spring of 1184, Pierre became Bishop of ArrasMichel Benoît Tock, the Episcopal election in Arras, Lambert to Pierre Ier (1093-1203) in Belgian journal of philology and history, vol 70, 1987, p. 719. and was consecrated during the Synod of Verona, in the autumn of the same year. He held this position until his death, November 1, 1203.Michel Tock, the charters of the Bishops of Arras (1093-1203), Paris, 1991 (Collection of unpublished documents on the history of France, serie in - 8 °, 20), p. XXXIX. , and he was buried in the Abbey of Pontigny.See also:Chrysogonus Waddell, Twelfth-century Statutes from the Cistercian General Chapter, (Brecht, 2002), p. 146.

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