Life (approximate): AD 30 - 100
Bishop of Rome (approximate): AD 90 / 91 - 100
Writings: Letter to the Corinthians
Early Sources Concerning Clement of Rome: (not a comprehensive list)
Paul - Philippians 4:3 (Eusebius claims that Paul is speaking about Clement here)
Irenaeus - Against Heresies: Book 3, Chapter 3
Eusebius - Church History: Book 3
Tertullian - Prescription Against Heretics
Timeline with Roman Emperors:
Introduction:
Clement of Rome, who according to the Roman Church is the fourth pope, is grouped among what are called the Apostolic Fathers. Apostolic church fathers are early church fathers who had dealings with the apostles. In the case of Clement, he is said to have been ordained by the Apostle Peter. There isn't a single book that tells about his life and thought, rather we have glimpses of the man through various sources. The only legitimate letter we have from him is his letter to the Corinthians which was read in many churches along with Scripture for several centuries."There is extant an epistle of this Clement which is acknowledged to be genuine and is of considerable length and of remarkable merit. He wrote it in the name of the church of Rome to the church of Corinth, when a sedition had arisen in the latter church. We know that this epistle also has been publicly used in a great many churches both in former times and in our own. And of the fact that a sedition did take place in the church of Corinth at the time referred to Hegesippus is a trustworthy witness." -Eusebius: Church History