 The BOK Tower , built during this period , is the 2nd tallest building in Oklahoma and the surrounding states of Missouri , New Mexico , Arkansas , and Kansas . Tulsa also has the third- , and fourth @-@ tallest buildings in the state , including the Cityplex Tower , which is located in South Tulsa across from Oral Roberts University , far from downtown . One of the area 's unique architectural complexes , Oral Roberts University , is built in a Post @-@ Modern Futuristic style , incorporating bright gold structures with sharp , jetting edges and clear geometric shapes . The BOK Center , Tulsa 's new arena , incorporates many of the city 's most prominent themes , including Native American , art deco , and contemporary architectural styles . Intended to be an architectural icon , the building was designed by César Pelli , the architect of the Petronas Towers in Malaysia . 
