▁the ▁Council ▁left ▁most ▁of ▁the ▁dioc ese ▁under ▁Ant io ch ' s ▁juris diction , ▁and ▁assigned ▁a ▁few ▁provinces ▁of ▁the ▁dioc ese ▁to ▁Alexand ria , ▁" since ▁the ▁like ▁is ▁custom ary ▁for ▁the ▁Bishop ▁of ▁Rome ▁also ." ▁ ▁In ▁that ▁scenario , ▁a ▁relevant ▁Roman ▁preced ent ▁is ▁invoked , ▁answering ▁L ough lin ' s ▁argument ▁as ▁to ▁why ▁the ▁custom ▁of ▁a ▁bishop ▁in ▁Rome ▁would ▁have ▁any ▁bearing ▁on ▁a ▁dispute ▁regarding ▁Alexand ria ▁in ▁Ori ens , ▁and ▁at ▁the ▁same ▁time ▁correct ing ▁Sch aff ' s ▁argument ▁that ▁the ▁bishop ▁of ▁Rome ▁was ▁invoked ▁by ▁way ▁of ▁illustr ation ▁" with ▁reference ▁to ▁his ▁own ▁dioc ese ." ▁The ▁custom ▁of ▁the ▁bishop ▁of ▁Rome ▁was ▁invoked ▁by ▁way ▁of ▁illustr ation , ▁not ▁because ▁he ▁pres ided ▁over ▁the ▁whole ▁Church , ▁or ▁over ▁the ▁western ▁Church ▁or ▁even ▁over ▁" his ▁own ▁dioc ese ," ▁but ▁rather ▁because ▁he ▁pres ided ▁over ▁a ▁few ▁provinces ▁in ▁a ▁dioc ese ▁that ▁was ▁otherwise ▁admin ister ed ▁from ▁Milan . ▁On ▁the ▁basis ▁of ▁that ▁preced ent , ▁the ▁council ▁recognized ▁Alexand ria ' s ▁ancient ▁juris diction ▁over ▁a ▁few ▁provinces ▁in ▁the ▁Dioc ese ▁of ▁Ori ens , ▁a ▁dioc ese ▁that ▁was ▁otherwise ▁admin ister ed ▁from ▁Ant io ch . ▁ ▁Lit urg ical ▁comm em oration ▁ ▁The ▁Church es ▁of ▁By z ant ium ▁celebr ate ▁the ▁F athers ▁of ▁the ▁First ▁E c