1 8 7 5 ▁painting ▁The ▁G ross ▁C lin ic . ▁Another ▁early ▁commission ▁was ▁for ▁a ▁set ▁of ▁twelve ▁larger - than - life - size ▁stat ues ▁of ▁Pres by ter ian ▁cl erg ymen ▁for ▁the ▁fac ade ▁of ▁the ▁With ers po on ▁Building ▁( 1 8 9 8 – 9 9 ) ▁in ▁Philadelphia . ▁ ▁In ▁ 1 9 0 6 , ▁he ▁was ▁elected ▁into ▁the ▁National ▁Academy ▁of ▁Design ▁as ▁an ▁Associ ate ▁member , ▁and ▁became ▁a ▁full ▁member ▁in ▁ 1 9 1 3 . ▁ ▁In ▁Pas ad ena , ▁he ▁mode led ▁architect ural ▁sculpt ure ▁for ▁the ▁Th ro op ▁Poly techn ic ▁Institute ▁( now ▁the ▁California ▁Institute ▁of ▁Technology ). ▁He ▁returned ▁to ▁the ▁east ▁coast ▁in ▁ 1 9 1 0 . ▁ ▁In ▁ 1 9 1 2 , ▁he ▁was ▁named ▁acting - ch ief ▁( under ▁Karl ▁B itter ) ▁of ▁the ▁sculpt ure ▁program ▁for ▁the ▁Pan ama - P ac ific ▁Ex position , ▁a ▁World ' s ▁Fair ▁to ▁open ▁in ▁San ▁Francisco , ▁California , ▁in ▁February ▁ 1 9 1 5 . ▁He ▁obtained ▁a ▁studio ▁in ▁NY C ▁and ▁there ▁employed ▁the ▁services ▁of ▁model ▁Aud rey ▁Mun son ▁who ▁pos ed ▁for ▁him ▁– ▁Star ▁Ma iden ▁( 1 9 1 3 – 1 9 1 5 ) ▁– ▁and ▁a ▁host ▁of ▁other ▁artists . ▁For ▁the ▁Ex position , ▁Cal der ▁completed ▁three ▁massive