The use of specially consecrating cemeteries among Christians is first mentioned by Gregory of Tours (c. 570); but under the Roman law they had, like those of the Pagans, been held inviolable by pagan emperors like Gordian and Julian and defined as "res religioni destinatae quin immo (iam) religionis effectae" (Cod.
The native state was restored by Gordian in 242; but in 244 it became again directly subject to Rome.
Colonia Augusta Aroe Patrensis became one of the most populous of all the towns of Greece; its colonial coinage extends from Augustus to Gordian III.
At Alexandria he attended the lectures of Ammonius Saccas, the founder of the system, until 242, when he joined the Persian .expedition of Gordian III., with the object of studying Persian and Indian philosophy on the spot.
After the assassination of Gordian in 244, Plotinus was obliged to take refuge in Antioch, whence he made his way to Rome and set up as a teacher there.