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Centuries: 3rd century - 4th century - 5th century
- November 6 - Julian is promoted to Caesar.
- For refusing to sign the condemnation of Athanasius of Alexandria, Pope Liberius is forcedly relegated to Beroea in Thrace. Felix II becomes bishop of Rome.
- The Franks besiege Cologne for 10 months.
- Aedesius, philosopher