306-337. Constantine (in Gaul).
311. First edict of toleration (by Galerius).
312-337. Constantine (in Italy).
312. Second edict of toleration (from Milan).
314. Council of Arles, on the Donatists, &c.
315-337. Constantine (in Illyricum).
Cir. 317. Athanasius de Incarnatione Verbi Dei.
Cir. 318. Outbreak of Arian controversy.
323-337. Constantine (in the East).
325 (June). Council of Nicæa.