ull ivan ▁worked ▁together ▁on ▁four ▁built ▁projects . ▁While ▁the ▁Ban ff ▁National ▁Park ▁Pav il ion ▁is ▁attributed ▁to ▁Wright ▁with ▁S ull ivan ' s ▁assistance , ▁the ▁other ▁three ▁are ▁attributed ▁to ▁S ull ivan ▁with ▁Wright ' s ▁assistance . ▁ ▁Design ▁▁ ▁The ▁pav il ion ▁featured ▁a ▁rust ic ▁style ▁over ▁a ▁frame ▁construction , ▁and ▁was ▁an ▁el ong ated ▁visitor ▁shelter ▁of ▁wood ▁and ▁stone . ▁Support ed ▁by ▁low ▁stone ▁walls ▁the ▁length ▁of ▁the ▁building ▁was ▁constructed ▁of ▁wood , ▁in ▁a ▁board - and - b atten ▁fashion . ▁Ste el ▁be ams ▁supported ▁the ▁cant ile ver ed ▁roof . ▁ ▁The ▁interior ▁was ▁primarily ▁an ▁assembly ▁l oun ge ▁ 1 0 0   ft ▁by ▁ 5 0   ft ▁in ▁size . ▁A ▁row ▁of ▁art ▁glass ▁windows ▁ran ▁the ▁entire ▁length ▁of ▁the ▁wall ▁opposite ▁the ▁main ▁entrance , ▁and ▁three ▁c ob bl estone ▁fire p laces ▁featured ▁on ▁the ▁remaining ▁three . ▁C ler est ory ▁windows ▁contributed ▁additional ▁light , ▁through ▁the ▁exposed ▁be ams ▁of ▁the ▁roof . ▁ ▁A ▁ladies ' ▁pow der ▁room ▁was ▁at ▁one ▁end ▁of ▁the ▁l oun ge , ▁with ▁a ▁gentlemen ' s ▁ret iring ▁room ▁at ▁the ▁other . ▁Each ▁room ▁measured ▁ 5 0   ft ▁by ▁ 2 5   ft . ▁The ▁pav il ion ▁also ▁featured ▁public ▁lock ers . ▁ ▁The ▁finished ▁product ▁was ▁only ▁us able ▁four ▁months