§6. The Council of Nicæa.
At the Council of Nicæa, which met pursuant to an imperial summons in the year 325 ., Eusebius played a very prominent part. A description of the opening scenes of the Council is given in his Vita Constantini, III. 10 sq. After the Emperor had entered in pomp and had taken his seat, a bishop who sat next to him upon his right arose and delivered in his honor the opening oration, to which the Emperor replied in a brief Latin address. There can be no doubt that this bishop was our Eusebius. Sozomen (H. E. I. 19) states it directly; and Eusebius, although he does not name the speaker, yet refers to him, as he had referred to the orator at the dedication of Paulinus’ church at Tyre, in such a way as to make it clear that it was himself; and moreover in his Vita Constantini, I. 1, he mentions the fact that he had in the midst of an assembly of the servants of God addressed an oration to the Emperor on the occasion of the latter’s vicennalia, i.e. in 325 On the other hand, however, Theodoret (H. E. I. 7) states that this opening oration was delivered by Eustathius, bishop of Antioch; while Theodore of Mopsuestia and Philostorgius (according to Nicetas Choniates, Thes. de orthod. fid. V. 7) assign it to Alexander of Alexandria. As Lightfoot suggests, it is possible to explain the discrepancy in the reports by supposing that Eustathius and Alexander, the two great patriarchs, first addressed a few words to the Emperor and that then Eusebius delivered the regular oration. This supposition is not at all unlikely, for it would be quite proper for the two highest ecclesiastics present to welcome the Emperor formally in behalf of the assembled prelates, before the regular oration was delivered by Eusebius. At the same time, the supposition that one or the other of the two great patriarchs must have delivered the opening address was such a natural one that it may have been adopted by Theodoret and the other writers referred to without any historical basis. It is in any case certain that the regular oration was delivered by Eusebius himself (see the convincing arguments adduced by Stroth, p. xxvii. sq.). This oration is no longer extant, but an idea of its character may be formed from the address delivered by Eusebius at the Emperor’s tricennalia (which is still extant under the title De laudibus Constantini; see below, p. 43) and from the general tone of his Life of Constantine. It was avowedly a panegyric, and undoubtedly as fulsome as it was possible to make it, and his powers in that direction were by no means slight.