The rest of _Italy_, with the Islands adjacent, containing the _suburbicarian_ regions, or ten Provinces under the temporal Vicar of _Rome, viz._ 1_Campania_, 2_Tuscia_ and _Umbria_, 3_Picenum suburbicarium_, 4_Sicily_, 5_Apulia_ and _Calabria_, 6_Brutii_ and _Lucania_, 7_Samnium_, 8_Sardinia_, 9_Corsica_, and 10_Valeria_, constituted the proper Province of the Bishop of _Rome_. For the Council of _Nice_ in their fifth Canon ordained that Councils should be held every spring and autumn in every Province; and according to this Canon, the Bishops of this Province met at _Rome_ every half year. In this sense Pope _Leo_ I. applied this Canon to _Rome_, in a decretal Epistle to the Bishops of _Sicily_, written _Alippio & Ardabure Coss_. A.C. 447. _Quia saluberrime_, saith he, _a sanctis patribus constitutum est, binos in annis singulis Episcoporum debere esse conventus, terni semper ex vobis ad diem tertium Kalendarum Octobrium Romam aeterno concilio sociandi occurrant. Et indissimulanter a vobis haec consuetudo servetur, quoniam adjuvante Dei gratia, facilius poterit provideri, ut in Ecclesiis Christi nulla scandala, nulli nascantur errores; cum coram Apostolo Petro semper in communione tractatum fuerit, ut omnia Canonum Decreta apud omnes Domini sacerdotes inviolata permaneant_. The Province of _Rome_ therefore comprehended _Sicily_, with so much of _Italy_ and the neighbouring Islands as sent Bishops to the annual Councils of _Rome_; but extended not into the Provinces of _Ravenna_, _Aquileia_, _Millain_, _Arles_, &c. those Provinces having Councils of their own. The Bishops in every Province of the _Roman_ Empire were convened in Council by the Metropolitan or Bishop of the head city of the Province, and this Bishop presided in that Council: but the Bishop of _Rome_ did not only preside in his own Council of the Bishops of the _suburbicarian_ regions, but also gave Orders to the Metropolitans of all the other Provinces in the _Western Empire_, as their universal governor; as may be further perceived by the following instances.