The First Epistle of Clement is a letter addressed to the Christians in the city of Corinth. Based on internal evidence some scholars say the letter was composed some time before AD 70, but the common time given for the epistle's composition is at the end of the reign of Domitian (c. AD 96). It ranks with Didache as one of the earliest, if not the earliest, of extant Christian documents outside the traditional New Testament canon. As the name suggests, a Second Epistle of Clement is known, but this is a later work by a different author. Part of the Apostolic Fathers collection, 1 and 2 Clement are not usually considered to be part of the canonical New Testament.
