▁up ▁much ▁opposition ▁within ▁the ▁arist ocracy , ▁and ▁under ▁the ▁impact ▁of ▁the ▁Norman ▁invasion ▁of ▁ 1 1 8 5 , ▁he ▁was ▁over th rown ▁and ▁killed , ▁mark ing ▁the ▁end ▁of ▁the ▁Kom nen ian ▁dynast y ▁on ▁the ▁By z antine ▁throne . ▁From ▁Manuel , ▁the ▁el dest ▁son ▁of ▁And ron ik os , ▁began ▁the ▁dynast y ▁of ▁the ▁Grand ▁Kom nen oi , ▁who ▁founded ▁and ▁ruled ▁the ▁Empire ▁of ▁Tre b iz ond ▁( 1 2 0 4 – 1 4 6 1 ). ▁ ▁Works ▁In ▁contrast ▁to ▁John , ▁who ▁was ▁chief ly ▁engaged ▁in ▁war fare ▁throughout ▁his ▁reign , ▁Isaac ▁was ▁a ▁scholar ▁and ▁patron ▁of ▁learning ▁and ▁the ▁arts . ▁A part ▁from ▁his ▁foundation ▁of ▁the ▁Kos mos ote ira ▁monaster y , ▁in ▁Constantin ople ▁he ▁restored ▁the ▁monaster y ▁of ▁St . ▁Stephen ▁in ▁the ▁quarter ▁A ure li ana e , ▁which ▁he ▁later ▁attached ▁to ▁the ▁Kos mos ote ira ▁as ▁a ▁rest ▁host el ▁for ▁mon ks ▁visit ing ▁the ▁capital . ▁▁ ▁In ▁ ▁he ▁re built ▁the ▁Ch ora ▁Church , ▁originally ▁restored ▁by ▁his ▁mat ernal ▁grand m other , ▁Maria ▁Dou k ain a . ▁The ▁Ch ora ▁was ▁also ▁the ▁initial ▁location ▁of ▁his ▁tomb , ▁before ▁he ▁had ▁it ▁transferred ▁to ▁the ▁Kos mos ote ira . ▁The ▁Ch ora ▁Church ▁contains ▁the ▁only ▁secure ly ▁att ested ▁dep iction ▁of ▁Isaac , ▁in ▁a