▁the ▁beh est ▁of ▁Emperor ▁Napoleon ▁III . ▁Initial ly ▁referred ▁to ▁as ▁" le ▁n ouvel ▁Op éra ▁de ▁Paris " ▁( the ▁new ▁Paris ▁Opera ), ▁it ▁soon ▁became ▁known ▁as ▁the ▁Pal ais ▁G arn ier , ▁" in ▁acknowled gment ▁of ▁its ▁extraordinary ▁op ul ence " ▁and ▁the ▁architect ▁Charles ▁G arn ier ' s ▁plans ▁and ▁designs , ▁which ▁are ▁representative ▁of ▁the ▁Napoleon ▁III ▁style . ▁It ▁was ▁the ▁primary ▁theatre ▁of ▁the ▁Paris ▁Opera ▁and ▁its ▁associated ▁Paris ▁Opera ▁Bal let ▁until ▁ 1 9 8 9 , ▁when ▁a ▁new ▁opera ▁house , ▁the ▁Op éra ▁Bast ille , ▁opened ▁at ▁the ▁Place ▁de ▁la ▁Bast ille . ▁The ▁company ▁now ▁uses ▁the ▁Pal ais ▁G arn ier ▁mainly ▁for ▁bal let . ▁The ▁theatre ▁has ▁been ▁a ▁monument ▁historique ▁of ▁France ▁since ▁ 1 9 2 3 . ▁ ▁The ▁Pal ais ▁G arn ier ▁has ▁been ▁called ▁" pro bably ▁the ▁most ▁famous ▁opera ▁house ▁in ▁the ▁world , ▁a ▁symbol ▁of ▁Paris ▁like ▁Notre ▁D ame ▁C athedral , ▁the ▁Lou vre , ▁or ▁the ▁Sac ré ▁Co eur ▁Bas il ica ." ▁This ▁is ▁at ▁least ▁partly ▁due ▁to ▁its ▁use ▁as ▁the ▁setting ▁for ▁Gast on ▁L er oux ' s ▁ 1 9 1 0 ▁novel ▁The ▁Ph antom ▁of ▁the ▁Opera ▁and , ▁especially , ▁the ▁novel ' s ▁subsequent ▁adapt ations ▁in ▁films ▁and ▁the ▁popular ▁ 1 9 8 6 ▁musical . ▁Another ▁contrib uting