▁tower ▁at ▁this ▁time ▁was ▁the ▁Br ut al ist ▁style ▁Sp encer ▁Street ▁headquarters ▁for ▁the ▁M MB W , ▁completed ▁in ▁ 1 9 7 9 , ▁and ▁cl ad ▁in ▁bl uest one ▁which ▁began ▁to ▁fall ▁off , ▁and ▁had ▁to ▁be ▁replaced ▁with ▁al umin ium ▁pan els . ▁ ▁In ▁the ▁late ▁ 1 9 7 0 s , ▁the ▁Per rott ▁office ▁designed ▁the ▁Museum ▁under ground ▁station ▁( now ▁Melbourne ▁Central ▁and ▁heavily ▁alter ed ▁apart ▁from ▁the ▁platforms ▁themselves ) ▁which ▁opened ▁in ▁ 1 9 8 1 . ▁In ▁the ▁early ▁ 1 9 8 0 s ▁PL M ▁worked ▁with ▁Ger ard ▁de ▁Pr ue ▁on ▁the ▁R ial to ▁Tow ers , ▁then ▁the ▁largest ▁project ▁in ▁the ▁city ▁and ▁the ▁tall est ▁in ▁the ▁country ▁from ▁ 1 9 8 6 - 9 1 . ▁▁ ▁In ▁the ▁mid ▁ 1 9 8 0 s ▁Care y ▁Lyon , ▁one ▁of ▁Ron ▁Lyon ' s ▁four ▁sons ▁( who ▁all ▁studied ▁architecture ▁and ▁were ▁grands ons ▁of ▁the ▁founder ▁Les lie ▁M ▁Per rott ▁though ▁their ▁mother ) ▁worked ▁for ▁the ▁firm , ▁bringing ▁in ▁the ▁third ▁generation ▁and ▁was ▁the ▁lead ▁designer ▁for ▁the ▁Tel stra ▁Corpor ate ▁Centre , ▁completed ▁in ▁ 1 9 9 1 . ▁In ▁the ▁early ▁ 1 9 9 0 s ▁PL M ▁were ▁part ▁of ▁the ▁collabor ative ▁team ▁that ▁designed ▁Melbourne ' s ▁first ▁cas ino , ▁Crown ▁Melbourne , ▁which