Time Line 284
- Roman emperor Numerian dies
- Diocletian becomes Roman emperor
- martyrdom of Saint Ariston
- martyrdom of Saint Crescentian
- martyrdom of Saint Futychian
- martyrdom of Saint Felicissimus
- martyrdom of Saint Felix
- martyrdom of Saint Justus
- martyrdom of Saint Maximilian of Celeia
- martyrdom of Saint Marcia
- martyrdom of Saint Symphorosa
- martyrdom of Saint Theopemptus
- martyrdom of Saint Theonas
- martyrdom of Saint Urban
- martyrdom of Saint Vitalis
| 283 | 285 |
