Editing 338 (section)

== Events ==
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=== By place ===
==== Roman Empire ====
* The Romans, allied with the [[Goths]], arrive in the north of the [[Roman Empire]] to protect the [[Danube]] frontier.
* Emperor [[Constantius II]] intervenes against the [[Persian people|Persians]] in [[Kingdom of Armenia (antiquity)|Armenia]].

==== Persia ====
* [[Shapur II]], king of the [[Sassanid Empire|Persian Empire]], begins a widespread persecution of [[Christians]]. He orders forcible conversions to the state religion, [[Zoroastrianism]], lest the Christians disrupt his realm while he is away fighting the Romans in [[Kingdom of Armenia (antiquity)|Armenia]] and [[Mesopotamia (Roman province)|Mesopotamia]].

==== Asia ====
* [[Tuoba Yihuai]], ruler of the [[Tuoba]] [[Dai (Sixteen Kingdoms)|Dai]] clan, dies and is succeeded by his brother [[Tuoba Shiyijian|Tuoba Shiyiqian]].

=== By topic ===
==== Art ====
* The [[Santa Costanza|Church of Santa Costanza]], [[Roman Italy|Rome]], starts to be built (approximate date).

==== Religion ====
* [[Eusebius of Nicomedia]] becomes [[List of patriarchs of Constantinople|Patriarch of Constantinople]], after [[Paul I of Constantinople|Paul I]] is banished.
* Non-Christians are persecuted by the [[Roman Empire]] as [[Paganism|pagans]].
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