On 6 November 355,
Julian was declared
Caesar by Constantius II. The new Caesar was a paternal first cousin to Helena and her siblings. He was a son of
Julius Constantius and his second wife
Basilina. His paternal grandparents were Constantius Chlorus and his second wife
Flavia Maximiana Theodora. At the time of his declaration Julian was the only viable candidate for this position, at least within the ranks of the
Constantinian dynasty. The various other males of the family had died out.
Zosimus reports: "Constantius declared him Caesar, gave him in marriage his sister Helena, and sent him beyond the
Alps. But being naturally distrustful, he could not believe that Julian would be faithful to him, and therefore sent along with him Marcellus and Sallustius, to whom, and not to Caesar, he committed the entire administration of that government."
Eutropius narrates: "Constantius then remained sole ruler and emperor over the Roman dominions. He then sent into
Gaul, with the authority of Caesar, his cousin Julian, the brother of
Gallus, giving him his sister in marriage, at a time when the
barbarians had stormed many towns and were besieging others, when there was everywhere direful devastation, and when the
Roman Empire was tottering in evident distress." According to
Socrates of Constantinople: "The emperor recalled him [Julian], and after created him Caesar; in addition to this, uniting him in marriage to his own sister Helen, he sent him against the barbarians. For the barbarians whom the Emperor Constantius had engaged as auxiliary forces against the tyrant
Magnentius, having proved of no use against the usurper, were beginning to pillage the Roman cities. And inasmuch as he [Julian] was young he [Constantius] ordered him to undertake nothing without consulting the other military chiefs."
Sozomen apparently confused Helena with her sister, calling her Constantia
Philostorgius reports: "He [Constantius] summoned Gallus' brother Julian from
Ionia and appointed him Caesar in
Milan, giving his own sister Helena to him as his wife and taking oaths with him. He then sent him to Gaul to watch over the realm there.". The marriage is also recorded in the
Chronicon Paschale. Constantine I had died in 337 and Fausta in 326, which would mean Helena was at least twenty-nine years old when she married Julian. ==Caesar's wife==