Constantius II ( 7 August 317 – 3 November 361) was Roman emperor from 337 to 361. His reign saw constant warfare on the borders against the Sasanian Empire and Germanic peoples, while internally the Roman Empire went through repeated civil wars, court intrigues, and usurpations. His religious policies inflamed domestic conflicts that would continue after his death.
 
The sources claim that realising his death was near, Constantius had himself baptised by Euzoius, the Semi-Arian bishop of Antioch, and then declared that Julian was his rightful successor. Constantius II died of fever on 3 November 361.
Like Constantine the Great, he was buried in the Church of the Holy Apostles, in a porphyry sarcophagus that was described in the 10th
century by Constantine VII Porphyrogenitus in the De Ceremoniis.