Permanent historical records · Updated 2026-11-03

421 in Roman Empire

Explore 7 historical events and records for Roman Empire in 421.

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Historical records for Roman Empire in 421

Sorted by month and day. Records with no month are shown last. Showing 7 of 7 unique records.

7Unique records

1 of 1Page

5Named events on this page

4Named people on this page

0Places on this page

February

8 February 421

Coup

Constantius III · House / House of Constantine

Succeeds as Emperor of Rome, Roman General who helps overthrow Constantine

8 February 421

Death of Constantius III

Constantius III · House / House of Constantine

Death of Constantius III

8 February 421

Succession

Constantius III · House / House of Constantine

Succeeds as Emperor of Rome, Roman General who helps overthrow Constantine

June

7 June 421

Marriage

Eudocia, Aelia · House / House of Theodosius

Theodosius II marries Aelia Eudocia

7 June 421

Marriage

Theodosius II · House / House of Theodosius

Theodosius II marries Aelia Eudocia

Other events (month unknown)

421

Peace

Theodosius II · Warfare / Rome War

Makes a lasting peace with the Persian Empire

421

Succession

Valentinian III · House / House of Valentinian

Emperor Honorius names Valentinian III as his succesor

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How these records were prepared

Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.