NPNF2-01. Eusebius Pamphilius: Church History, Life of Constantine, Oration in Praise of Constantine

Chapter II.—The First Ruler of the Church of Rome.

1. After the martyrdom of Paul and of Peter, Linus⁵⁷⁶ was the first to obtain the episcopate of the church at Rome. Paul mentions him, when writing to Timothy from Rome, in the salutation at the end of the epistle.(2 Tim. iv. 21)⁵⁷⁷