Pietro Senex[1] (died 1134) was Cardinal-Bishop of Porto from 1102 until his death. He was born probably in Rome.
- ^ Brixius, p. 37, appears to indicate that "senex" is a scholarly nickname, not a personal name or a family name. B. Zenker, Die Mitglieder des Kardinalkollegiums von 1130 bis 1159 (Würzburg: Universität 1964), p. 25, calls him "Petrus Senex, der älteste der Anakletianer." But in the electoral decree for Pope Anacletus II, he subscribes himself "Petrus Senex Portuensis episcopus".