▁ 1 9 4 6 ▁his ▁or atorio ▁A ve ▁Maria ▁premier ed ▁at ▁the ▁Notre ▁D ame ▁C athedral ▁in ▁Nice ▁st arring ▁En zo ▁Ser i , ▁Ten or ▁and ▁L otte ▁Sch ö ne , ▁S op rano . ▁Str ad ella ▁in ▁V ened ig , ▁composed ▁during ▁his ▁years ▁in ▁hiding , ▁premier ed ▁in ▁ 1 9 4 9 ▁at ▁the ▁Zürich ▁Opera ▁House . ▁The ▁music ▁critic ▁Kurt ▁P ahlen ▁called ▁it ▁" a ▁com ic ▁opera ▁of ▁the ▁highest ▁sort " ▁and ▁the ▁member ▁of ▁the ▁Ac adémie ▁Fran çaise ▁André ▁R ous sin ▁adapted ▁the ▁libre tto ▁to ▁the ▁French ▁stage . ▁Be er ▁spent ▁most ▁of ▁his ▁time ▁until ▁his ▁death ▁in ▁ 1 9 8 7 ▁creating ▁two ▁new ▁works : ▁the ▁oper as ▁La ▁Pol ona ise ▁( 1 9 7 5 ) ▁and ▁ ▁( 1 9 8 7 .) ▁ ▁Later ▁life ▁After ▁the ▁war ▁years ▁Be er ▁married ▁a ▁young ▁German ▁Jewish ▁refuge e , ▁H anna ▁König s berg , ▁in ▁ 1 9 5 7 . ▁They ▁had ▁two ▁daughters , ▁Su z anne ▁and ▁Bé atrice . ▁ ▁In ▁ 1 9 6 6 , ▁Be er ▁earned ▁a ▁doctor ate ▁in ▁music ology ▁from ▁the ▁Sor bon ne ▁University ▁under ▁the ▁direction ▁of ▁ren owned ▁music ologist ▁Jacques ▁Ch ail ley ▁and ▁the ▁presiden cy ▁of ▁the ▁French ▁phil os opher ▁and ▁music ologist , ▁Vladimir ▁J ank él év itch . ▁The ▁topic