Constantina Augusta was the eldest daughter of Constantine the Great, Roman Emperor. She was born of his second marriage with Empress Fausta, daughter of Emperor Maximianus. The date of her birth is unclear, however it was after 307 and presumably before 317. Constantine. ... Fausta, as Salus, holding her two sons, Constantine II and Constantius II. Fausta Flavia Maxima was the daughter of the Roman Emperor Maximianus. ... Maximianus (d. ...

Her father granted her the title Augusta.

She was married firstly, in 335 during the reign of her father, to her cousin Hannibalianus, whom Constantine had created "King of Kings and Ruler of the Pontic Tribes". Hannibalianus was murdered in 337.

For the second time, during the reign of her middle brother Constantius II, Constantina Augusta was married to Hannibalianus' and her own first cousin Gallus Caesar, who was created a Caesar and renamed Constantius around 449/450, which also presumably was the time of their marriage. emperor Constantius II Constantius II, Roman Emperor (7 August 317 - 3 November 361, reigned 337 - 361), was the middle of the three sons of Constantine I the Great and Fausta. ... Gallus coin celebrating Rome and Constantinople. ...

Gallus was twenty-five or twenty-six at the time, whereas Constantina was substantially his senior.

The Passio Artemii 12 alleges that the marriage was meant to ensure Gallus' loyalty but it may have had at least as much to do with Constantina who, besides having known power as Constantine's daughter and Hannibalianus' wife, had prompted the opposition of Vetranio 1 (PLRE I, p. 954) to Magnentius, and whose hand had been sought from Constantius by ambassadors of Magnentius himself (Peter the Patrician fr. 16, Müller FHG IV, p. 190). The marriage, besides benefiting Constantius, extricated her from a dangerous situation in the west and placed her in a position from which she might control the younger and inexperienced Caesar. On the other hand, it is possible that Constantius saw the marriage as a way to remove his intrusive -- perhaps treasonous -- sister from the volatile west.6 If the mention in the Passio Artemii (11) of letters from Constantina to her brother preserves a genuine tradition, it is possible Constantina even initiated the proposal that she marry Gallus.   This article is about the year 6. ...

Her second marriage produced a daughter, whose name and fate are unknown.