Interrex in the context of "Marcus Lepidus"

The Roman magistrates (Latin: magistratus) were elected officials in ancient Rome. During the period of the Roman Kingdom, the King of Rome was the principal executive magistrate. His power, in practice, was absolute. He was the chief priest, lawgiver, judge, and the sole commander of the army. When the king died, his power reverted to the Roman Senate, which then chose an Interrex to facilitate the election of a new king.

During the transition from the Roman Kingdom to Roman Republic, the constitutional balance of power shifted from the executive (the Roman king) to the Roman Senate. When the Roman Republic was founded in 509 BC, the powers that had been held by the king were transferred to the Roman consuls, of which two were to be elected each year. Magistrates of the republic were elected by the people of Rome, and were each vested with a degree of power called "major powers" (maior potestas). Dictators had more "major powers" than any other magistrate, and after the dictator was the censor, and then the consul, and then the praetor, and then the curule aedile, and then the quaestor. Any magistrate could obstruct ("veto") an action that was being taken by a magistrate with an equal or lower degree of magisterial powers. By definition, plebeian tribunes and plebeian aediles were technically not magistrates since they were elected only by the plebeians, and plebeian tribunes could veto the actions of any ordinary magistrate.

Ancus Marcius (Classical Latin: [ˈaŋkʊs ˈmaːrkiʊs]) was the legendary fourth king of Rome, who traditionally reigned 24 years. Upon the death of the previous king, Tullus Hostilius, the Roman Senate appointed an interrex, who in turn called a session of the assembly of the people who elected the new king. Ancus is said to have ruled by waging war as Romulus did, while also promoting peace and religion as Numa Pompilius did.

Ancus Marcius was believed by many Romans to have been the namesake of the Marcii, a plebeian family.

The executive magistrates of the Roman Empire were elected individuals of the ancient Roman Empire. During the transition from monarchy to republic, the constitutional balance of power shifted from the executive (the Roman King) to the Roman Senate. During the transition from republic to empire, the constitutional balance of power shifted back to the executive (the Roman Emperor). Theoretically, the senate elected each new emperor, although in practice, it was the army which made the choice. The powers of an emperor, (his imperium) existed, in theory at least, by virtue of his legal standing. The two most significant components to an emperor's imperium were the "tribunician powers" (potestas tribunicia) and the "proconsular powers" (imperium proconsulare). In theory at least, the tribunician powers (which were similar to those of the Plebeian Tribunes under the old republic) gave the emperor authority over Rome's civil government, while the proconsular powers (similar to those of military governors, or Proconsuls, under the old republic) gave him authority over the Roman army. While these distinctions were clearly defined during the early empire, eventually they were lost, and the emperor's powers became less constitutional and more monarchical.

Under the empire, the citizens were divided into three classes, and for members of each class, a distinct career path was available (known as the cursus honorum). The traditional magistracies were only available to citizens of the senatorial class. The magistracies that survived the fall of the republic were (by their order of rank in the cursus honorum) the Consulship, Praetorship, Plebeian Tribunate, Aedileship, Quaestorship, and Military Tribunate. If an individual was not of the senatorial class, he could run for one of these offices if he was allowed to run by the emperor, or otherwise, he could be appointed to one of these offices by the emperor. Mark Antony abolished the offices of Roman Dictator and Magister equitum ("Master of the Horse") during his Consulship in 44 BC, shortly after the assassination of Julius Caesar. The office of Interrex was also abolished during the transition from republic to empire. In 22 BC the emperor Augustus appointed P. Aemilius Lepidus and L. Munatius Plancus to the Censorship, and while they began a census that year, they never completed it, and shortly thereafter the office was abolished. The emperor Claudius attempted to revive the office by appointing himself and L. Vitellius Censor in 47 AD, but after Claudius, no further attempts were made to revive the office.

Manius Curius Dentatus (died 270 BC) was a Roman general and statesman noted for ending the Samnite War and for his military exploits during the Pyrrhic War. According to Pliny, he was born with teeth, thus earning the surname Dentatus, "toothed."

Dentatus was a tribune of the plebs sometime between 298 and 291 BC. As tribune, he foiled efforts by the interrex Appius Claudius Caecus to keep plebeian candidates out of the consular elections. If his tribunate is dated to 291, his actions advanced his own candidacy, but since Appius served three times as interrex, the earliest date accords better with the timeline of Dentatus's own career.