During his office as Proconsul of Achaea he appealed against an edict by Emperor Valentinian I (issued in 364) that forbade night sacrifices during the Mysteries: Praetextatus maintained that this edict made it impossible for pagans to keep their faith, and Valentinian nullified his own edict.Zosimus, iv.3.2–3; Valentinian's law has been preserved in the Codex Theodosianus, (ix.16.7).
