| 490. | Battle of Marathon. | |
|---|---|---|
| 260. | Sapor I, the second Sassanid shah, took Antioch, captured the Emperor Valerian, and was cut up on his return from Asia Minor by Odenathus of Palmyra. |
| 277. | Mani crucified in Persia. | |
|---|---|---|
| 284. | Diocletian became emperor. | |
| 303. | Diocletian persecuted the Christians. | |
| 311. | Galerius abandoned the persecution of the Christians. | |
| 312. | Constantine the Great became emperor. | |
| 323. | Constantine presided over the Council of Nicïa. | |
| 337. | Constantine baptized on his deathbed. | |
| 361-3. | Julian the Apostate attempted to substitute Mithraism for Christianity. | |
| 392. | Theodosius the Great emperor of east and west. |