▁building ▁is ▁a ▁representation ▁of ▁a ▁distinct ly ▁American ▁ext rap olation ▁of ▁the ▁Be aux ▁Arts ▁mode . ▁Horn b ost el ▁was ▁known ▁for ▁this ▁architect ural ▁style , ▁and ▁architect ural ▁historian ▁James ▁Van ▁Trump ▁has ▁stated ▁that ▁Horn b ost el ▁kept ▁the ▁principles ▁of ▁the ▁Be aux ▁Arts ▁central ▁with ▁his ▁designs , ▁but ▁also ▁frequently ▁depart ed ▁from ▁the ▁pre cept s , ▁and ▁integrated ▁elements ▁of ▁other ▁styles ▁a kin ▁to ▁industri ally - in sp ired ▁brut al ism . ▁The ▁design ▁of ▁the ▁building ▁was ▁also ▁influenced ▁by ▁the ▁City ▁Beautiful ▁Mov ement . ▁This ▁movement ▁featured ▁urban ▁planning ▁with ▁so aring ▁Ne oc lass ical ▁buildings , ▁clean ▁and ▁order ly ▁designs , ▁and ▁included ▁the ▁concept ▁of ▁the ▁“ White ▁City ”. ▁The ▁City - Count y ▁Building ▁was ▁one ▁of ▁Pitts burgh ' s ▁first ▁attempts ▁at ▁incorpor ating ▁the ▁City ▁Beautiful ▁Mov ement ▁into ▁its ▁urban ▁design . ▁ ▁Some ▁of ▁the ▁most ▁significant ▁design ▁elements ▁of ▁the ▁building ▁include ▁the ▁Grand ▁Lob by , ▁which ▁is ▁a ▁naturally ▁lit ▁at rium ▁with ▁a ▁ 4 7 - foot ▁high ▁bar rel - v ault ed ▁ce iling . ▁The ▁ce iling ▁is ▁held ▁up ▁by ▁bronze ▁columns ▁craft ed ▁by ▁Louis ▁T iff any ▁Studios . ▁They ▁feature ▁at ▁their ▁bases , ▁the ▁Se als ▁of ▁Pitts burgh ▁and ▁Al leg hen y ▁County , ▁front iers man ▁Guy as uta , ▁and ▁Pitts burgh ' s ▁oldest ▁surv