451
- Alternate uses, see Number 451.
| Years: 447 448 449 450 - 451 - 452 453 454 455 | |
| Decades: 420s 430s 440s - 450s - 460s 470s 480s | |
| Centuries: 4th century - 5th century - 6th century | |
Events
- September 20 - Attila, king of the Huns, invades Gaul, but is stopped in his tracks at Troyes by Aetius in the Battle of Chalons.
- Thorismund succeeds Theodorid his father as king of the Visigoths.
- October 8 - Council of Chalcedon, Ecumenical council of the Christian church.
- Jerusalem becomes a Patriarchate.
- The Oriental Orthodox churches separate from the rest of the church.
- Dioscorus of Alexandria is deposed as Patriarch of Antioch.
- Sassanid ruler Yazdegerd II of Persia's decree abolishes the Sabbath and orders executions of Jewish leaders, including the Exilarch Mar Nuna.
Births
- Jacob of Serugh - Syriac author
Deaths
- Nestorius, founder of Nestorianism (estimated date)
- Theodorid, king of the Visigoths (killed in the Battle of Chalons)
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