338 CE
Eusebius of Nicomedia becomes Patriarch of Constantinople, after Paul I is banished. Tuoba Yihuai, ruler of the Tuoba Dai clan, dies and is succeeded by his brother Tuoba Shiyiqian. The Church of Santa Costanza, Rome, starts to be built (approximate date).
Conflict & Security
- The Romans, allied with the Goths, arrive in the north of the Roman Empire to protect the Danube frontier.source
- Shapur II, king of the 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 Armenia and Mesopotamia.source
- Emperor Constantius II intervenes against the Persians in Armenia.source
Religion & Belief
Technology & Infrastructure
- The Church of Santa Costanza, Rome, starts to be built (approximate date).source
Births
- Isaac the Great, Armenian catholicos (d. 439)source