The author of the First Epistle of Peter identifies himself in the opening verse as "Peter, an apostle of Jesus Christ", and the view that the epistle was written by St. Peter is attested to by a number of Church Fathers: Irenaeus (140–203), Tertullian (150–222), Clement of Alexandria (155–215) and Origen of Alexandria (185–253). Unlike The Second Epistle of Peter, the authorship of which was debated in antiquity, there was little debate about Peter's authorship of this first epistle until the 18th century. Although 2 Peter internally purports to be a work of the apostle, many biblical scholars have concluded that Peter is not the author. For an early date and (usually) for a defense of the Apostle Peter's authorship see Kruger, Zahn, Spitta, Bigg, and Green.