co-emperor
Joint imperial ruler
A co-emperor is a joint ruler sharing imperial authority with another emperor.
The arrangement was common in the Roman Empire, where senior emperors appointed colleagues or successors to help govern vast territories: Diocletian established a system of co-emperors to stabilize the empire.
The term applies to similar arrangements in other imperial systems.
Emperor who embraced Christianity
- Marcus AureliusStoic emperor of Rome
- tetrarchRuler of a fourth
- AugustusRome's inaugural emperor
- CaesarRoman imperial title
Rule by two equals
- partitionBarrier separating spaces
- power-sharingJointly held governmental authority
- successionFollowing in order
- dual sovereigntyTwo authorities over one territory
Ongoing contest between opponents
- fratricideKilling one's own brother
- civil warDomestic armed conflict
- assassinationMurder of a prominent figure
- usurpationWrongful seizure of power
power struggle · conspiracy · partition · reconciliation · coup · deposition · exile · murder
Historic Turkish metropolis
- associationGroup with shared aim
- blindingPainfully intense light
- depositionFormal testimony under oath
- usurperIllegal power seizer
Constantine
Emperor who embraced Christianity
- Marcus AureliusStoic emperor of Rome
- tetrarchRuler of a fourth
- AugustusRome's inaugural emperor
diarchy
Rule by two equals
- partitionBarrier separating spaces
- power-sharingJointly held governmental authority
- successionFollowing in order
rivalry
Ongoing contest between opponents
- fratricideKilling one's own brother
- civil warDomestic armed conflict
- assassinationMurder of a prominent figure
usurpation · power struggle · conspiracy · partition · reconciliation · coup · deposition · exile · murder · jealousy
Constantinople
Historic Turkish metropolis
- associationGroup with shared aim
- blindingPainfully intense light
- depositionFormal testimony under oath
- Roman EmpireAugustus, Pax Romana, Praetorian Guard, Roman Senate, Caesar
- ByzantiumConstantinople, Hagia Sophia, Byzantium, Constantine I, Theodora
- shared rulers
emperor, emperors, empress, empresses, empire, empires, imperial, imperialism, imperialist