Clement is traditionally classified as the fourth pope (90-100). Although his contemporaries might not have recognised such a title, he was certainly a Christian leader who lived in Rome, and who sent an epistle to the Corinthians which demonstrates concern for events far beyond his own parish. As such he has been marked out as a key figure in the development of the Roman ascendancy.

He wrote his letter around 96 in the hope of healing the dissensions among the Christians of Corinth. St Paul himself had preached in that town in the early and mid-50s, leaving a congregation which had for many years proved exemplary in their faith.