The Athenian Agora 24; Late Antiquity A.D. 267-700; From Diokletian to the Visigothic Invasion; Diokletian to Julian the Apostate A.D. 284-363; The Progress of Christianity. L' école d' Athènes au Ive ... Agora 24 18 ... T.D. Barnes, Lactantius and Constantine, JRS 63, 1973, pp. 30ff ... T.D. Barnes, Constantine and Eusebius, Cambridge, Mass./London 1981