eror _Gratian_, he
saith: _Totius orbis Romani caput Romanam Ecclesiam, atque illam
sacrosanctam Apostolorum fidem, ne turbari sineret, obsecranda fuit
clementia vestra; inde enim in omnes venerandae communionis jura dimanant_.
The Churches therefore of _Aquileia_ and _Millain_ were subject to the See
of _Rome_ from the days of the Emperor _Gratian_. _Auxentius_ the
predecessor of _Ambrose_ was not subject to the see of _Rome_, and
consequently the subjection of the Church of _Millain_ began in _Ambrose_.
This Diocese of _Millain_ contained _Liguria_ with _Insubria_, the _Alpes
Cottiae_ and _Rhaetia_; and was divided from the Diocese of _Aquileia_ by the
river _Addua_. In the year 844, the Bishop of _Millain_ broke off from the
See of _Rome_, and continued in this separation about 200 years, as is thus
related by [13] _Sigonius_: _Eodem anno Angilbertus Mediolanensis
Archiepiscopus ab Ecclesia Romana parum comperta de causa descivit,
tantumque exemplo in posterum valuit, ut non nisi post ducentos annos
Ecclesia Mediolanensis ad Romanae obedientiam auctoritatemque redierit_.

The Bishop of _Ravenna_, the Metropolis of _Flaminia_ and _AEmilia_, was
also subject to the Pope: for _Zosimus_, A.C. 417, excommunicated some of
the Presbyters of that Church, and wrote a commonitory Epistle about them
to the Clergy of that Church as a branch of the _Roman_ Church: _In sua_,
saith he, _hoc est, in Ecclesia nostra Romana_. When those of _Ravenna_,
having elected a new Bishop, gave notice thereof to Pope _Sixtus_, the Pope
set him aside, and [14] ordained _Peter Chrysologus_ in his room.
_Chrysologus_ in his Epistle to _Eutyches_, extant in the Acts of the
Council of _Chalcedon_, wrote thus: _Nos pro studio pacis & fidei, extra
consensum Romanae civitatis Episcopi, causas fidei audire non possumus_.
Pope _Leo_ I. being consulted by _Leo_ Bishop of _Ravenna_ about some
questions, answered him by a decretal Epistle A.C. 451. And Pope _Gregory_
the great, [15] reprehending _John_ Bishop of _Ravenna_ about the use of
the _Pallium_, tells him of a Precept of one of his Predecessors, Pope
_John_, commanding that all the Privileges formerly granted to the Bishop
and Church of _Ravenna_ should be kept: to this _John_ returned a
submissive answer; and after his death Pope _Gregory_ ordered a visitation
of the Church of _Ravenna_, confirmed the privileges heretofore granted
them, and sent his _Pallium_, as of antient custom, to their new Bishop