ed ▁because ▁the ▁paper ▁used ▁for ▁some ▁of ▁them ▁could ▁not ▁have ▁been ▁obtained ▁in ▁the ▁United ▁States ▁from ▁ 1 9 1 6 ▁to ▁ 1 9 1 8 , ▁when ▁O ' K ee ffe ▁taught ▁art ▁at ▁West ▁Texas ▁State ▁Normal ▁College ▁in ▁C any on . ▁The ▁National ▁Gallery ▁of ▁Art ▁subsequently ▁ex cluded ▁the ▁" C any on ▁Su ite " ▁from ▁O ' K ee ffe ' s ▁catalog ue ▁raison ne , ▁and ▁Ger ald ▁Peters ▁Gallery ▁ref und ed ▁the ▁$ 5 ▁million ▁that ▁the ▁K em per ▁Museum ▁paid ▁for ▁them . ▁ ▁Architecture ▁K em per ▁Museum ’ s ▁ 2 3 , 2 0 0 - square - foot ▁concrete , ▁steel , ▁and ▁glass ▁building , ▁constructed ▁from ▁ 1 9 9 2 ▁to ▁ 1 9 9 4 ▁at ▁a ▁cost ▁of ▁$ 6 . 6 ▁million , ▁was ▁designed ▁by ▁architect ▁G unn ar ▁B irk ert s . ▁The ▁structure ▁has ▁a ▁large ▁central ▁at rium ▁under ▁an ▁art ic ulated ▁sk yl ight . ▁Two ▁wings ▁extend ▁from ▁either ▁side ▁of ▁the ▁at rium . ▁The ▁main ▁gallery ▁hosts ▁three ▁major ▁exhib itions ▁each ▁year . ▁Side ▁gall eries ▁present ▁works ▁from ▁the ▁permanent ▁collection ▁in ▁rotation . ▁Works ▁of ▁art ▁are ▁always ▁on ▁view ▁in ▁the ▁at rium ▁and ▁the ▁cor rid ors ▁of ▁each ▁wing . ▁San ▁Francisco ▁Chron icle ▁noted ▁that ▁B irk ert s ▁“ used ▁concrete , ▁glass ▁and ▁steel ▁in ▁ways