Bishop of Salona, directed him to denounce the Apostolic decrees as well to the Bishops of his own, as to those of the neighbouring Provinces.  The subjection of these Provinces to the See of Rome seems to have begun in Anemius, who was ordained Bishop of Sirmium by Ambrose Bishop of Millain, and who in the Council of Aquileia under Pope Damasus, A.C. 381, declared his sentence in these words:  Caput Illyrici non nisi civitas Sirmiensis:  Ego igitur illius civitatis Episcopus sum.  Eum qui non confitetur filium Dei aeternum, & coeternum patri, qui est sempiternus, anathema dico.  The next year Anemius and Ambrose, with Valerian Bishop of Aquileia, Acholias Bishop of Thessalonica, and many others, went to the Council of Rome, which met for overruling the Greek Church by majority of votes, and exalting the authority of the Apostolic See, as was attempted before in the Council of Sardica.

Aquileia was the second city of the Western Empire, and by some called the second Rome.  It was the Metropolis of Istria, Forum Julium, and Venetia; and its subjection to the See of Rome is manifest by the decretal Epistle of Leo I. directed to Nicetas Bishop of this city; for the Pope begins his Epistle thus:  Regressus ad nos filius meus Adeodatus Diaconus Sedis nostrae, dilectionem tuam poposcisse memorat, ut de his a nobis authoritatem Apostolicae Sedis acciperes, quae quidem magnam difficultatem dijudicationis videntur afferre.  Then he sets down an answer to the questions proposed by Nicetas, and concludes thus:  Hanc autem Epistolam nostram, quam ad consultationem tuae fraternitatis emisimus, ad omnes fratres & comprovinciales tuos Episcopos facies pervenire, ut in omnium observantia, data profit authoritas.  Data 1-2 Kal.  Apr.  Majorano Aug.  Cos. A.C. 458. Gregory the great A.C. 591, [6] cited Severus Bishop of Aquileia to appear before him in judgment in a Council at Rome.

The Bishops of Aquileia and Millain created one another, and therefore were of equal authority, and alike subject to the See of Rome.  Pope Pelagius about the year 557, testified this in the following words:  [7] Mos antiquus fuit, saith he, ut quia pro longinquitate vel difficultate itineris, ab Apostolico illis onerosum fuerit ordinari, ipsi se invicem Mediolanensis & Aquileiensis ordinare Episcopos debuissent.  These words imply that the ordination of these two Bishops belonged to the See of Rome.  When Laurentius Bishop of Millain had excommunicated Magnus, one of his Presbyters, and was dead, [8] Gregory the great absolved Magnus, and sent the Pallium to the new elected Bishop Constantius; whom the next year [9] he reprehended of partiality in judging