▁ 1 8 6 9 . ▁ ▁He ▁remained ▁attached ▁to ▁the ▁region ▁of ▁his ▁birth ▁throughout ▁his ▁life . ▁As ▁a ▁member ▁of ▁cultural ▁and ▁social ▁groups ▁such ▁as ▁" The ▁Bret ons ▁de ▁Paris ," ▁also ▁called ▁" La ▁Pom me ", ▁he ▁participated ▁in ▁their ▁C elt ic ▁d inners , ▁cultural ▁and ▁musical ▁celebr ations . ▁The ▁influence ▁of ▁his ▁musical ▁colle agues ▁Louis - Al bert ▁Bour g ault - D uc oud ray , ▁Guy ▁R op art z , ▁and ▁Louis ▁Tier cel in , ▁members ▁of ▁the ▁Bre ton ▁Renaissance ▁Mov ement , ▁is ▁particularly ▁evident ▁in ▁his ▁Ch ants ▁d ' Ar mor ique ▁composed ▁in ▁ 1 8 8 9 . ▁ ▁At ▁the ▁request ▁of ▁the ▁publish er ▁Led uc , ▁Dur and ▁spent ▁the ▁last ▁twenty ▁years ▁of ▁his ▁life ▁writing ▁his ▁major ▁theoretical ▁works ▁for ▁which ▁he ▁is ▁best ▁remembered : ▁Tra ité ▁d ' harm onie ▁thé or ique ▁et ▁pr atique ▁( 1 8 8 1 ), ▁Tra ité ▁d ' ac comp agn ement ▁pr atique ▁au ▁piano ▁( 1 8 8 4 ) ▁and ▁Tra ité ▁de ▁composition ▁musicale ▁( 1 8 9 9 ). ▁ ▁É mile ▁Dur and ▁died ▁in ▁Neu illy - sur - Se ine , ▁Haut s - de - Se ine ▁on ▁ 6 ▁or ▁ 7 ▁May ▁ 1 9 0 3 , ▁and ▁he ▁was ▁buried ▁at ▁P ère ▁L ach a ise ▁C emetery ▁in ▁Paris .