Marcus Claudius Marcellus (Julio-Claudian dynasty)

Marcus Claudius Marcellus (42 – 23 BC) was the eldest son of Gaius Claudius Marcellus Minor, a former Roman consul, and of Octavia Minor, sister of Caesar Augustus, and hence was Augustus' nephew. He married the emperor's daughter Julia two years prior to his death, and served in that same year, 25 BC, under Augustus in Hispania alongside the future emperor Tiberius. He was given preference and so was elected at an unusually young age as a curule aedile, a magistrate's office, an honor Marcellus celebrated by presenting extraordinary public games (with Augustus' support). His ambitions are said to have brought him into conflict with Agrippa and with others: he is described as the presumptive monarchic heir of Augustus (though not by Augustus), or as his beloved nephew and son-in-law (though less preferred than Agrippa as heir). He died at c. 19 years of age, in Baiae, Campania, Italy, in 23 BC, and was buried in the mausoleum of Augustus, specific cause of death uncertain. His mother Octavia built a library in his honor, and Augustus' fondness was expressed in his funeral oration, and in naming a theatre and placing funerary statues of him (e.g., Marcellus as Hermes Logios). Though dying young and unproven, Marcellus' position led to his celebration by Sextus Propertius and by Virgil in the Aeneid.

Marcellus, born 42 BC, was the eldest son of Augustus's sister Octavia Minor and Gaius Claudius Marcellus Minor, a former consul, and hence Augustus's nephew. He was descended through his father from Marcus Claudius Marcellus, a famous general in the Second Punic War.

Augustus had no sons, and Marcellus was one of his closest relatives. Marcellus was therefore engaged to Pompeia, daughter of Sextus Pompey at the age of three, when his uncle needed to solidify a peace with Sextus Pompey (though after Pompey was defeated, the engagement was annulled). Marcellus was seen often in public with Augustus as he grew older, including at his triumphs over Mark Antony and Cleopatra, and in a campaign against the Cantabri.

In 25 BC, just two years prior to his death, Marcellus was married to Augustus' only daughter, Julia the Elder, with Agrippa officiating in Augustus's absence. On Augustus's falling ill at this period "all were expecting that Marcellus would be preferred for Augustus's successor", according to Dio. Velleius, a pro-Augustan source, states that:

People thought that, if anything should happen to Caesar, Marcellus would be his successor in power, at the same time believing, however, that this would not fall to his lot without opposition from Marcus Agrippa. He was, we are told, a young man of noble qualities, cheerful in mind and disposition, and equal to the station for which he was being reared.

According to historians, this passage supports the suggestion in Tacitus and other sources that other potential heirs such as Tiberius and Agrippa felt threatened by Marcellus's rise. After the marriage Agrippa set out for Asia "on the pretext of commissions from the emperor, but, according to current gossip, was in fact withdrawing for the time being, on account of his secret animosity for Marcellus". In addition, Dio states that:

[Augustus] well understood that Agrippa was exceedingly beloved by the people and he preferred not to seem to be committing the supreme power to him on his own responsibility. When he recovered, for, and learned that Marcellus because of this was not friendly toward Agrippa, he immediately sent the latter to Syria, so that no occasion for scoffing or for skirmishing might arise between them by their being together. And Agrippa straightway set out from the city, but did not reach Syria; instead, acting with even more than his usual moderation, he sent his lieutenants thither, and tarried himself in Lesbos.

In the same year as his marriage, 25 BC, Marcellus served under Augustus in Spain, alongside future emperor Tiberius. Augustus began to encourage Marcellus' political career, in 23 BC gaining him the right to be a senator among the ex-praetors, to stand for the consulship ten years earlier than was customary, and through

his election to a magistrate’s office, as a curule aedile that year, "at a younger age than normal," an honor that Marcellus celebrated with Augustus' approval and assistance through "exceptionally magnificent games," ones that Velleius called "a magnificent spectacle." According to Tacitus, Marcellus was also appointed to the College of Pontiffs by Augustus.

Marcellus' ambitions are said to have brought him into conflict with Agrippa and others. He is variously described as being the presumptive monarchic heir of Augustus (though this was denied by Augustus), or as beloved by Augustus as nephew and son-in‑law, though with Agrippa preferred before him as heir.

As it would come to pass, Marcellus did not live to see completed the theatre that Augustus had commissioned; he became ill in the year of his aedileship, and died soon after, at approximately 19 years of age, in Baiae, Campania, Italy. His death was ascribed to Livia (by hearsay), as reiterated skeptically by Cassius Dio, an ascription also followed in Robert Graves' historical novel I, Claudius. Whether he died of an infectious disease, or food or other poisoning, or another ailment is uncertain.

He was buried in his uncle's mausoleum and Augustus expressed his fondness in giving the funeral oration. His mother Octavia built a library in his honor, and Augustus completed and named the Theatre of Marcellus for his lost nephew, and placed funerary statues of Marcellus (e.g., Marcellus as Hermes Logios. Dio states:

Augustus gave him a public burial after the customary eulogies, placing him in the tomb he was building ... And he ordered also that a golden image of the deceased, a golden crown, and a curule chair should be carried into the theatre [of Marcellus] at the Ludi Romani and should be placed in the midst of the officials having charge of the games.

This he did later; at the time, after being restored to health, he brought his will into the senate and desired to read it, by way of showing people that he had left no successor to his realm; but he did not read it, for none would permit it. Absolutely everybody, however, was astonished at him because, although he loved Marcellus both as son-in‑law and nephew.... nevertheless he had not entrusted to him the monarchy, but actually had preferred Agrippa before him. Thus it would appear that he was not yet confident of the youth's judgment, and that he either wished the people to regain their liberty or for Agrippa to receive the leadership from them.

Virgil reading Aeneid, Book VI, to Octavia, by Tailasson

Marcellus was celebrated further by Sextus Propertius, and was added by Virgil at the end of the list of illustrious future Romans whom Aeneas sees in the underworld, in the Aeneid. The passage—recounting Marcellus's life, connecting him to his illustrious ancestor Marcellus the Elder, and lamenting his tragically early death—is said to have caused Octavia to faint with grief when it was read.