▁tent - like ▁can opy ▁that ▁soft ens ▁the ▁monument ality ▁of ▁the ▁Grand ▁Ar che ▁at ▁La ▁Dé f ense . ▁In ▁ 1 9 8 5 ▁I .   M .   P ei ▁asked ▁his ▁help ▁with ▁projects ▁at ▁the ▁Lou vre ▁in ▁Paris , ▁namely ▁the ▁shell ▁structures ▁for ▁the ▁glass ▁roof s ▁that ▁Pe i ▁planned ▁to ▁cover ▁inner ▁cour ty ards . ▁ ▁By ▁then ▁he ▁was ▁in ▁great ▁demand ▁continu ing ▁to ▁work ▁with ▁architect s ▁such ▁as ▁Richard ▁Rog ers , ▁I .   M .   P ei , ▁Norman ▁F oster , ▁Ian ▁R itch ie , ▁Ken zo ▁T ange , ▁Paul ▁And reu , ▁and ▁Ren zo ▁P iano . ▁The ▁projects ▁he ▁worked ▁on ▁r anged ▁from ▁Toronto ' s ▁Opera ▁House ▁by ▁Mos he ▁Saf die ▁to ▁K ans ai ' s ▁International ▁Airport , ▁one ▁of ▁many ▁projects ▁with ▁the ▁Ren zo ▁P iano ▁Building ▁Work shop . ▁ ▁In ▁addition ▁to ▁his ▁huge ▁output , ▁he ▁was ▁known ▁for ▁his ▁sympath etic ▁attitude ▁to ▁design , ▁his ▁strateg ic ▁approach , ▁a ▁cool ▁head ▁and ▁man aging ▁to ▁real ise ▁am bit ious ▁art istic ▁designs ▁in ▁concrete ▁reality . ▁One ▁of ▁his ▁marks ▁as ▁an ▁engineer ▁was ▁the ▁length ▁of ▁time ▁he ▁allowed ▁to ▁complete ▁a ▁project . ▁ ▁During ▁his ▁relatively ▁short ▁career , ▁R ice ' s ▁contribution ▁to ▁the ▁built ▁environment ▁can ▁be ▁seen ▁in ▁the ▁work ▁of ▁the ▁recent ▁P ritz ker