| Year | Domestic Events | External Events |
|---|---|---|
| 193 AD | Pertinax murdered by soldiers. Didus Julianus bought the throne. Spetimius Severus proclaimed by the Illyrian legions. Great jurist Papinian flourishes | Expedition to Britain. Emperor died at York. Strengthening of walls |
| 211 AD | Caracalla | All inhabitants of provinces (expect Egypt) become citizens |
| 217 AD | Baths of Caracalla finished | |
| 218 AD | Elagabalus. Attempt to introduce Sun-worship | |
| 222 AD | Severus Alexander. The jurist Ulpian and the historian Dio Cassius flourished | New Persian Empire of the Sassanidae begun |
| 235 AD | Maximinus Thrax | |
| 238 AD | Gordianus I and II and III | |
| 244 AD | Philippus the Arabian | |
| 249 AD | Decius. Persecution of Christians | Defeat of the Goths in Thrace. Decius fell in the fighting |
| 251 AD | Gallus | |
| 253 AD | Aemilianus, then Valerianus | War against German invaders, Franks, Alemanni, and Goths. Expedition to Persia. Emperor captured |
| 260 AD | Gallienus. Time of great confusion owing to pretenders. "The thirty tyrants" | Tetricus sets up a rival empire in Gaul and Spain. Odenathus sets up an independant kingdom at Palmyra in Syria |
| 268 | Cluadius Gothicus | Defeats German invaders |
| 270 AD | Aurelian (Restitutor Orbis). Wall around Rome | Sacrifices Dacia across the Danube to the Goths. Repulses Alemanni and Marcomanne from Italian soil. Defeats Zenobia and destroys Palmyra. Defeats Tetricus |
| 273 AD | Temple of the Sun constructed at Helipolis | |
| 275 AD | Tacitus (choice of the senate) | |
| 276 AD | Probus | Drives back the Barbarians and restores the defences |
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