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In ancient Rome, imperium was a form of authority held by a citizen to control a military or governmental entity. It is distinct from auctoritas and potestas, different and generally inferior types of power in the Roman Republic and Empire. One's imperium could be over a specific military unit, or it could be over a province or territory. Individuals given such power were referred to as curule magistrates or promagistrates. These included the curule aedile, the praetor, the consul, the magister equitum, and the dictator. In a general sense, imperium was the scope of someone's power, and could include anything, such as public office, commerce, political influence, or wealth. Imperium originally meant absolute or kingly power—the word being derived from the Latin verb imperare (to command)—which became somewhat limited under the Republic by the collegiality of the republican magistrates and the right of appeal, or provocatio, on the part of citizens. Imperium remained absolute in the army, and the power of the imperator (army commander) to punish remained uncurtailed. The title imperator later was exclusively held by the emperor, as the commander of the armed forces. In fact, the Latin word imperator is the root of the English word emperor. In ancient Rome, imperium could be used as a term indicating a characteristic of people, their wealth in property, or the measure of formal power they had. This qualification could be used in a rather loose context (for example, poets used it, not necessarily writing about state officials). However, in Roman society, it was also a more formal concept of legal authority. A man with imperium (an imperator) had, in principle, absolute authority to apply the law within the scope of his magistracy or promagistracy. He could be vetoed or overruled either by a magistrate or promagistrate who was a colleague with equal power (e.g., a fellow consul), by one whose imperium outranked his – that is, one of imperium maius (greater imperium), or by a tribune of the plebs. Some modern scholars such as A.

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Related concepts (17)

Ancient Rome

In modern historiography, ancient Rome refers to Roman civilisation from the founding of the Italian city of Rome in the 8th century BC to the collapse of the Western Roman Empire in the 5th century AD. It encompasses the Roman Kingdom (753–509 BC), Roman Republic (509–27 BC), and Roman Empire (27 BC–476 AD) until the fall of the western empire. Ancient Rome began as an Italic settlement, traditionally dated to 753 BC, beside the River Tiber in the Italian Peninsula.

Roman consul

A consul was the highest elected public official of the Roman Republic (509 BC to 27 BC). Romans considered the consulship the second-highest level of the cursus honoruman ascending sequence of public offices to which politicians aspiredafter that of the censor. Each year, the Centuriate Assembly elected two consuls to serve jointly for a one-year term. The consuls alternated each month holding fasces (taking turns leading) when both were in Rome. A consul's imperium extended over Rome and all its provinces.

Roman emperor

The Roman emperor was the ruler and monarchial head of state of the Roman Empire during the imperial period, starting with the granting of the title augustus to Octavian in 27 BC. The emperors used a variety of different titles throughout history. Often when a given Roman is described as becoming emperor in English, it reflects his taking of the title augustus and later basileus. Another title often used was caesar, used for heirs-apparent, and imperator, originally a military honorific.