Cappochi, Pietro, an Italian prelate, was made cardinal in 1244 by pope Innocent IV, whom he accompanied the following year to the Council of Lyons. In 1247- he assisted at the Diet of Frankfort, in which William of Holland was named as emperor. After this election Cappochi was commissioned to maintain by arms the pretensions of William, and the interests of the court of Rome in Italy. He acquitted himself ably in this difficult task. 'On his return to Rome he established the church of Notre Dame de la Place. He died at Rome, May 18,1259. See Hoefer, Nouv. Biog. Generale, s.v.