	Peter was the son of Peter, Count of Brixey, and Matilda of Rinel (Risnel, Rinelle). He was made a canon of Toul in 1152, then archdeacon in 1156. In 1165, the previous Bishop of Toul, Henry I of Lorraine, died; two years later, Peter was elected to succeed him, and consecrated by Hillin of Falmagne, Archbishop of Trier, of whom he was a suffragan.