Emperor

An emperor was a male monarch, usually the sovereign ruler of an empire or another type of imperial realm.

An empress, the female equivalent, could be an emperor's wife (empress consort) or, in Queen Victoria's case, a woman who ruled in her own right (empress regnant). (TV: Tooth and Claw) An empress' husband was sometimes an emperor consort. (AUDIO: Empire of the Racnoss) Emperors were generally recognised to be of a higher honour and rank than kings.

Emperors and their domains
One Racnoss Empress had one emperor consort before she chose a new emperor. (AUDIO: Empire of the Racnoss)

The Dalek Emperor ruled the Dalek Empire. There were at least six different Dalek Emperors, notably including Davros, (TV: Remembrance of the Daleks) the Golden Emperor, (COMIC: Invasion of the Daleks) and the Emperor in 200100. (TV: The Parting of the Ways)

There was a Cyber-Emperor, who ruled over the Cyber-Empire, (COMIC: Kane's Story, Frobisher's Story) and a Uvodni Emperor who ruled the Uvodni Empire. (TV: Warriors of Kudlak)

In the post-War universe, the universe was ruled by the Emperor, one of the surviving elementals, from the Needle. (PROSE: Father Time)

On Earth, the leader of the Roman Empire was called Caesar, beginning with Julius Caesar. Nero, (TV: The Romans) Augustus, Tiberius, (AUDIO: 100 BC) Claudius, (PROSE: Of the City of the Saved...) and Hadrian were Caesars. (AUDIO: Many Happy Returns) In the Empire of Empires, the Caesar of Roma I was given the title Prime Emperor. (PROSE: Warlords of Utopia)

Justinian was Emperor of Byzantium in 540. (PROSE: The Secret History)

Kublai Khan was Emperor of the Mongols and China. (TV: Marco Polo)

Charlemagne reigned over the Holy Roman Empire (PROSE: The Lonely Computer) and Franz Joseph was emperor over Austria. (AUDIO: The Silver Turk) Napoléon Bonaparte was the Emperor of France. His nephew, Napoleon III, was emperor in the 1860s.(PROSE: World Game)

Ludens Nimrod Kendrick Cord Longstaff XLI was a human emperor, known as the imperator of space. (TV: Nightmare in Silver)

In a timeline where River Song caused time to collapse when she refused to kill the Doctor, Winston Churchill was the Holy Roman Emperor in Britain. (TV: The Wedding of River Song)