Papias of Hierapolis (fl. c. 110 CE), a bishop who was active in the early 2nd century CE, authored a now lost book, the Exposition of the Oracles of the Lord, which purports to have related ancient Christian traditions, including on the origin and composition of the Gospels. Fragments from Papias’ work are preserved in quotations and summaries found in later writers, though the authenticity of many of them is disputed.