Eusebius in his Onomasticon uses it as a central point from which the distances of other towns are measured.
Eusebius did not find them in the Hexaplar Septuagint.'
The better sources make Sardica the scene of meeting and name Eusebius (of Nicomedia) as the prelate who attended Constantine.
Its author made use of Eusebius's Life of Constantine, and of the histories of Rufinus, Socrates and Sozomen, and probably of Philostorgius as well.
The `EAXnvucwv OEpairEvruo lraen,uhTwv (De Curandis Graecorum Affectionibus) - written before 438 - is of an historical and apologetic character, very largely indebted to Clement of Alexandria and Eusebius; it aims at showing the advantages of Christianity as compared with " the moribund but still militant " Hellenism of the day, and deals with the assaults of pagan adversaries.