This is the first systematic collection of the remains of the lost Greek chronicles from the period AD 350–650 and provides an edition and translation of and commentary on the fragments. Introducing neglected authors and proposing new interpretations, it reveals the diversity of the genre and revises traditional views about its development, nuancing in particular the role usually attributed to Eusebius of Caesarea. It shows how the writing of chronicles was deeply entangled in controversies about exegesis and liturgy, especially the dates of Christmas and Easter. Drawing from Latin, Armenian, Syriac and Arabic sources besides Greek ones, the book also studies how chronographic material travelled across linguistic and cultural boundaries. In this way, it sheds a profoundly new light on historiography in transition from Antiquity to the Middle Ages.