Saint Clement of Rome (called CLEMENS ROMANUS to distinguish him from the Alexandrian), is the first of the successors of St. Peter of whom anything definite is known, and he is the first of the “Apostolic Fathers”. His feast is celebrated 23 November. He has left one genuine writing, a letter to the Church of Corinth, and many others have been attributed to him.
The fourth pope
According to Tertullian, writing c. 199, the Roman Church claimed that Clement was ordained by St. Peter (De Praescript., xxxii), and St. Jerome tells us that in his time “most of the Latins” held that Clement was the immediate successor of the Apostle (Illustrious Men 15). St. Jerome himself in several other places follows this opinion, but here he correctly states that Clement was the fourth pope. The early evidence shows great variety. The most ancient list of popes is one made by Hegesippus in the time of Pope Anicetus, c. 160 (Harnack ascribes it to an unknown author under Soter, c. 170), cited by St. Epiphanius (Haer., xxvii, 6). It seems to have been used by St. Irenæus (Haer., III, iii), by Julius Africanus, who composed a chronography in 222, by the third- or fourth-century author of a Latin poem against Marcion, and by Hippolytus, who see chronology extends to 234 and is probably found in the “Liberian Catalogue” of 354. That catalogue was itself adopted in the “Liber Pontificalis”. Eusebius in his chronicle and history used Africanus; in the latter he slightly corrected the dates. St. Jerome’s chronicle is a translation of Eusebius’s, and is our principal means for restoring the lost Greek of the latter; the Armenian version and Coptic epitomes of it are not to be depended on. The varieties of order are as follows:
Linus, Cletus, Clemens (Hegesippus, ap. Epiphanium, Canon of Mass).
Linus, Anencletus, Clemens (Irenaeus, Africanus ap. Eusebium).
Linus, Anacletus, Clemens (Jerome).
Linus, Cletus, Anacletus, Clemens (Poem against Marcion),
Linus, Clemens, Cletus, Anacletus [Hippolytus (?), “Liberian Catal.”- “Liber. Pont.”].
Linus, Clemens, Anacletus (doubts that Cletus, Anacletus, Anencletus, are the same person. Anacletus is a Latin error; Cletus is a shortened (and more Christian) form of Anencletus. Lightfoot thought that the transposition of Clement in the “Liberian Catalogue” was a mere accident, like the similar error “Anicetus, Pius” for “Pius Anicetus”, further on in the same list. But it may have been a deliberate alteration by Hippolytus, on the ground of the tradition mentioned by Tertullian. St. Irenæus (III, iii) tells us that Clement “saw the blessed Apostles and conversed with them, and had yet ringing in his ears the preaching of the Apostles and had their tradition before his eyes, and not he only for many were then surviving who had been taught y the Apostles”. Similarly Epiphanius tells us (from Hegesippus) that Clement was a contemporary of Peter and Paul. Now Linus and Cletus had each twelve years attributed to them in the list. If Hippolytus found Cletus doubled by an error (Cletus XII, Anacletus XII), the accession of Clement would appear to be thirty-six years after the death of the Apostles. As this would make it almost impossible for Clement to have been their contemporary, it may have caused Hippolytus to shift him to an earlier position. Further, St. Epiphanius says (loc. cit.): “Whether he received episcopal ordination from Peter in the life-time of the Apostles, and declined the office, for he says in one of his epistles ‘I retire, I depart, let the people of God be in peace’, (for we have found this set down in certain Memoirs), or whether he was appointed by the Bishop Cletus after he had succeeded the Apostles, we do not clearly know.” The “Memoirs” were certainly those of Hegesippus. It seems unlikely that he is appealed to only for the quotation from the Epistle, c. liv; probably Epiphanius means that Hegesippus stated that Clement had been ordained by Peter and declined to be bishop, but twenty-four years later really exercised the office for nine years.
[From The Catholic Encyclopedia]