521
| Years: 517 518 519 520 – 521 – 522 523 524 525 | |
| Decades: 490s 500s 510s – 520s – 530s 540s 550s | |
| Centuries: 5th century – 6th century – 7th century | |
Events
- Future Byzantine emperor Justinian becomes consul.
- Samson of Dol is ordained as a bishop.
Births
- December 7 – Saint Columba at Gartan, Donegal
Deaths
- Jacob of Serugh, Syrian writer
Categories: 521