423
| Years: 419 420 421 422 - 423 - 424 425 426 427 | |
| Decades: 390s 400s 410s - 420s - 430s 440s 450s | |
| Centuries: 4th century - 5th century - 6th century | |
Events
- On the death of Honorius, the primicerius notariorum Joannes siezes the throne of the Western Roman Empire, and is declared emperor.
- Theodoret becomes bishop of Cyrrhus.
Deaths
- Flavius Augustus Honorius, west Roman Emperor.
- Northern Wei Ming Yuan Di, ruler of the Chinese Northern Wei Dynasty