Augustus, the first Roman emperor, was born in Rome on 23 September 63BC as Gaius Octavius. In his early childhood he was raised by his parents, Gaius Octavius and Atia, but after the elder Octavius's death he was raised in part by his stepfather Lucius Marcius Philippus and his grandmother Julia. In his youth he was provided an education in Greek and Latin rhetoric, mathematics, and philosophy.
Dictator Julius Caesar, Octavius's great-uncle, helped foster his early career after Octavius donned the at age 15 to mark his coming of age as an adult citizen. Caesar had Octavius elected to the College of Pontiffs, ride in his chariot during a triumph, and accompany him on a military campaign in Hispania. Caesar named Octavius as his primary heir in his will, but was assassinated on the Ides of March in 44BC while Octavius was studying and undergoing military training at Apollonia in Illyria. Afterwards, Octavius sailed back to Italy to claim his inheritance as the rightful heir to Caesar, and is labeled by historians at this stage with the name Octavian. Ultimately victorious after a series of civil wars, he would eventually be named Augustus by the Roman Senate in 27BC, an event that traditionally marks the end of the Roman Republic and beginning of the Roman Empire.
Augustus was born Gaius Octavius in Rome on 23 September 63BC. Historians Anne-Marie Lewis and Karl Galinsky explain how there is scholarly debate surrounding Octavius's precise date of birth. Evidence that it had occurred on 22 September is based on statements by historians such as Suetonius and Velleius Paterculus, though Cassius Dio affirms it occurred on 23 September, and confusion also stems from the transition of using the early Republican Roman calendar to using the Julian Calendar during Octavius's lifetime. Most Roman histories gloss over the childhood of Octavius. Some details about his upbringing from his now-lost autobiography were preserved by Suetonius. However, the majority of information is preserved in a biography composed by Nicolaus of Damascus around 20BC. This biography has only partially survived in 10th-century Byzantine excerpts, namely the . Appian and Cassius Dio provide information about the rise of Augustus as a triumvir, while Cassius Dio and Tacitus focus on Augustus's role as and reign as the first Roman emperor.
Octavius was a member of the respectable, but undistinguished, equestrian Octavii family through his father, also named Gaius Octavius. The younger Octavius was also the great-nephew of Julius Caesar through his mother Atia. Octavius had two older siblings: a half sister, Octavia Major, from his father's first marriage, and a full sister, Octavia Minor. His paternal family was from the Volscian town of Velitrae (modern Velletri), approximately south-east of the city. He was born at Ox Head, a small property on the Palatine Hill, very close to the Roman Forum. For at least a portion of his childhood he was raised in his family's hometown of Velitrae.
Octavius's paternal great-grandfather Octavius was a military tribune in Sicily during the Second Punic War. His grandfather was a banker. However, the family entered the senatorial ranks with Octavius's father, the elder Octavius, as its novus homo. The elder Octavius's entrance into the Senate came when he was appointed quaestor. He ascended the Cursus honorum as quaestor , aedile , and praetor in 61BC, before being made proconsular governor of Macedonia, where he was proclaimed for victories against the Thracian Bessi tribe on its frontiers.
In his childhood, Octavius may have received the cognomen "Thurinus" to commemorate his father's victory at Thurii over a rebellious band of slaves who were followers of Spartacus. Later, after he had taken the name of Caesar, his rival Mark Antony referred to him as in order to belittle him. However, Antony did so by insinuating Octavius's great-grandfather was a mere plebeian rope-maker at Thurii, a dismissive insult based on social class.
The elder Octavius proved himself a capable administrator in Macedonia. Upon returning to Italy, before he could stand for consulship, he suddenly died in Nola in 59BC, or in 58BC, when Octavius was only four or five years old. In 58BC Octavius's mother Atia married a former governor of Syria, Lucius Marcius Philippus. Philippus came from a leading family in Rome and was elected consul in 56BC. According to Galinsky, as Octavius's stepfather, Philippus likely served as a role model in how to delicately navigate troubled political waters while preserving his personal wealth. It is also likely Octavius was partly raised by his grandmother Julia, the sister of Julius Caesar. When Julia died in 52 or 51BC, Octavius delivered her funeral oration, his first major public appearance. Historian Patricia Southern adds that such a move carried political connotations for Octavius:
Historian Adrian Goldsworthy concurs about the political importance of the eulogy. However, he insists that it was delivered in 51 BC when Octavius was 12 years old. He also does not mention the political context that includes Gaius Marius.
Octavius was educated in reading, writing, arithmetic, and the Greek language by a Greek slave tutor named Sphaerus, who Octavius later freed from slavery and honored with a state funeral in 40BC. Galinsky claims Sphaerus educated Octavius in the household of his stepfather Philippus, whereas Goldsworthy claims Sphaerus educated Octavius in the household of Atia's parents. As a teenager he studied philosophy under the tutelage of Areios of Alexandria and Athenodorus of Tarsus, Latin rhetoric under Marcus Epidius, and Greek rhetoric under Apollodorus of Pergamon. In 48 or 47BC Octavius donned the ('toga of manhood'). Southern explains the discrepancy among primary sources for the age in which Octavius was allowed to wear the :
Galinsky claims Octavius's coming of age ceremony for wearing the was in 48BC, as opposed to Southern, who claims it occurred during 47BC. Goldsworthy also says Octavius exchanged his for the on 18 October 47BC. However, he clarifies "Octavius was a few weeks past his sixteenth birthday", not 15 years old per Southern.
In 63BC Julius Caesar became , head of the College of Pontiffs, allowing him to build political clout and eventually form the so-called 'first triumvirate' with statesmen Pompey and Marcus Licinius Crassus in 60BC. This informal alliance, which superseded but did not suspend Rome's constitution, had fallen apart by the time Caesar crossed the Rubicon on 11 January 49BC and initiated a protracted civil war. Southern asserts "the so-called 'first Triumvirate'" formed in 60/59BC between Caesar, Pompey, and Crassus was not a term they would have recognized in their own day, and was only an informal alliance. Southern insists it is a "convenient modern term" made analogous to the later legally sanctioned and so-called 'second triumvirate' formed by Octavian, Antony and Lepidus. By 46BC Caesar was elected to serve as dictator for a ten-year term, an unprecedented length of time for the office of dictatorship that was invoked for handling limited crises and state emergencies.
At the request of Caesar, to fill a priesthood position left vacant by Lucius Domitius Ahenobarbus (after he was killed at the Battle of Pharsalus), Julius Caesar requested Octavius be elected to the College of Pontiffs in Rome, being accepted in 47BC. The following year he was put in charge of the Greek games staged in honor of the Temple of Venus Genetrix built by Julius Caesar. In late 47BC, Octavius wished to join Caesar's staff for his campaign in Africa but gave way when his mother Atia protested over his poor health. Treating him as a son, Caesar had Octavius proceed next to his chariot during his triumph celebrating the campaign, and had him awarded with military decorations as if he had been present for it. In 46BC, Atia consented for Octavius to join Caesar in Hispania, where he planned to fight the lingering forces of Pompey, Caesar's late enemy, but Octavius fell ill and was unable to travel. In 45BC Octavius finally traveled to Hispania to join Caesar's camp during the fight against the forces of Gnaeus Pompeius Magnus the Younger (son of Pompey), convincing Atia not to join him there despite her worries about his fragile physical health. The cause of Octavius's perennial health problems is not clear. Goldsworthy speculates Augustus's later serious illness suffered in 23BC may have been feigned or psychosomatic, and if real, both he and Southern have suggested a liver abscess.
Caesar deposited a new will with the Vestal Virgins. Julius Caesar returned to Rome from Hispania in October 45BC, but first he drafted his will while staying at his villa in Labici just outside of Rome. It was here where he named Octavius as the prime beneficiary and his principal heir on 13 September 45BC. Goldsworthy provides a different date for Julius Caesar drafting his will, writing that it took place on 15 September 45BC.
It is alleged Caesar nominated Octavius to serve as Master of the Horse (Caesar's chief lieutenant) for the year 43BC, thus making Octavius the number-two man in the state at the age of 19. However, a recently discovered inscription proves Octavius was not appointed , in contradiction to the theory formed by Theodor Mommsen. The title may stem from conflation in Greek between the and . Historian Helga Gesche disagreed with Walter Schmitthenner on the issue. Schmitthenner argued 16-year-old Octavius was too young to serve as , and this was conflated with his role as during the festivities. Gesche, with whom Ernst Badian agreed, argued Octavius's appointment to the office of was described plainly enough in Latin by Pliny the Elder, and thus he did not seem to confuse the terminology translated into Greek. Southern argues Octavius being a relative political nobody in Rome shortly after Caesar's assassination undercuts the idea he had ever served in the prestigious office of .
Hoping to continue Octavius's education, at the end of 45BC Caesar sent him along with his friendsâÂÂincluding Marcus Vipsanius Agrippa, Quintus Salvidienus Rufus, and Gaius MaecenasâÂÂto Apollonia in Illyria (in what is now Albania), across the Adriatic Sea from Italy. At Apollonia, Octavius was tutored on academic subjects, self-control exercises, and military doctrine and tactics. Octavius's tutor Apollodorus of Pergamon accompanied him on the journey. Caesar, however, had more than just education in mind for Octavius. He had sent several legions to nearby Macedonia in preparation for an upcoming war with the Parthian Empire.
The war with the Parthians never came during Caesar's lifetime. In 44BC, Octavius was still studying and undergoing military training at Apollonia when Caesar was made Rome's first ('dictator in perpetuity') in February. Caesar was then assassinated on the Ides of March (15 March) by senators opposed to him. It is alleged a slave owned by Octavius's mother traveled to Apollonia to inform him about the assassination.
Rejecting the advice of some army officers to take refuge with his troops in Macedonia, Octavius sailed to Italy to claim his inheritance and mantle as Caesar's rightful heir. It was then made public that Caesar had adopted Octavius as his son and main heir. In response, Octavius changed his name to Gaius Julius Caesar Octavianus and accepted his inheritance outlined in the will. To avoid confusion, modern scholars commonly refer to him at this point as Octavian (Latin: ). However, he called himself "Caesar", which is the name his contemporaries used, though some such as Cicero and his stepfather Philippus called him Octavianus. Standing victorious after a series of armed conflicts against Sextus Pompey, his rival triumvir Mark Antony, and Cleopatra, Queen of Ptolemaic Egypt, by 30BC Octavian became the most powerful individual in the Roman world. In 27BC the Senate voted to grant him the title of , an event which historians view as the end of the Roman Republic and start of the principate phase of the Roman Empire.
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