Capital: Roma
Title History
- 0003-01-27:Augustus Inherited
- 0024-08-19:Tiberius Inherited
- 0037-03-16:Caligula Inherited
- 0041-01-24:Claudius Inherited
- 0054-10-13:Nero Inherited
- 0068-06-09:Galba Inherited
- 0069-01-15:Otho Inherited
- 0069-04-16:Vitellius Inherited
- 0069-12-20:Vespasian Inherited
- 0079-06-23:Titus Inherited
- 0081-09-13:Domitian Inherited
- 0096-09-18:Nerva Inherited
- 0098-01-27:Trajan Inherited
- 0117-08-09:Hadrian Inherited
- 0138-07-10:Antoninus Inherited
- 0161-03-07:Lucius Inherited
- 0169-02-01:Marcus Inherited
- 0180-03-17:Commodus Inherited
- 0193-01-01:Pertinax Inherited
- 0193-03-29:Julian Inherited
- 0193-06-01:Septimius Inherited
- 0211-02-04:Geta Inherited
- 0211-12-19:Caracalla Inherited
- 0217-04-08:Macrinus Inherited
- 0218-06-08:Heliogabalus Inherited
- 0222-03-11:Alexander Inherited
- 0235-03-19:Maximinus Inherited
- 0238-03-22:Gordian Inherited
- 0238-04-01:Gordian Inherited
- 0238-04-12:Pupienus Inherited
- 0238-06-01:Balbinus Inherited
- 0238-07-29:Gordian Inherited
- 0244-02-11:Philip Inherited
- 0249-09-01:Decius Inherited
- 0251-06-01:Gallus Inherited
- 0253-07-01:Aemilian Inherited
- 0253-08-01:Valerian Inherited
- 0260-06-01:Gallienus Inherited
- 0268-08-01:Claudius Inherited
- 0270-01-15:Quintillus Inherited
- 0270-05-01:Aurelian Inherited
- 0275-07-01:Severina Inherited
- 0275-09-25:Tacitus Inherited
- 0276-06-01:Florian Inherited
- 0276-09-01:Probus Inherited
- 0282-10-01:Carus Inherited
- 0283-08-01:Numerian Inherited
- 0284-11-01:Carinus Inherited
- 0285-07-01:Diocletian Inherited
- 0311-12-03:destroyed