▁of ▁Th ess al onica , ▁An ast as ius , ▁Leo ▁repro ached ▁him ▁for ▁the ▁way ▁he ▁had ▁treated ▁one ▁of ▁the ▁metropol itan ▁b ish ops ▁subject ▁to ▁him ; ▁after ▁giving ▁various ▁instructions ▁about ▁the ▁functions ▁entr usted ▁to ▁An ast as ius ▁and ▁stress ing ▁that ▁certain ▁powers ▁were ▁reserved ▁to ▁the ▁po pe ▁himself , ▁Leo ▁wrote : ▁" The ▁care ▁of ▁the ▁universal ▁Church ▁should ▁conver ge ▁towards ▁Peter ' s ▁one ▁seat , ▁and ▁nothing ▁anywhere ▁should ▁be ▁separated ▁from ▁its ▁Head ." ▁ ▁He ▁succeeded ▁in ▁having ▁an ▁imperial ▁patri arch , ▁Tim othy ▁Sal oph aki ol os , ▁and ▁not ▁Tim othe us ▁A el urus , ▁chosen ▁as ▁Co ptic ▁Orth odox ▁Pope ▁of ▁Alexand ria ▁on ▁the ▁murder ▁of ▁Greek ▁Patri arch ▁Pro ter ius ▁of ▁Alexand ria . ▁ ▁Writ ings ▁ ▁Al most ▁ 1 0 0 ▁ser m ons ▁and ▁ 1 5 0 ▁letters ▁of ▁Leo ▁I ▁have ▁been ▁preserved . ▁ ▁The ▁T ome ▁ ▁At ▁the ▁Second ▁Council ▁of ▁E ph es us ▁in ▁ 4 4 9 , ▁Leo ' s ▁represent atives ▁delivered ▁his ▁famous ▁T ome , ▁a ▁statement ▁of ▁the ▁faith ▁of ▁the ▁Roman ▁Church ▁in ▁the ▁form ▁of ▁a ▁letter ▁addressed ▁to ▁Arch bishop ▁F lav ian ▁of ▁Constantin ople , ▁which ▁repe ats , ▁in ▁close ▁ad her ence ▁to ▁August ine ▁of ▁Hi ppo , ▁the ▁formulas ▁of ▁western ▁Christ ology . ▁The ▁council ▁did ▁not ▁read