Year of the Six Emperors (238)
Reign of Gordian III (238-244)
Reign of Philip the Arab (244-249)
Reign of Decius and Herennius Etruscus (249-251)
Reign of Trebonianus Gallus (251-253)
Reign of Aemilianus (253)
Reign of Valerian & Gallienus (253-60)
Reign of Gallienus (260-268)
Reign of Postumus (260–269) (Gallic Empire)
Reign of Victorinus (269–271)
Reign of Aurelian (270-275)