Looking North from 5th Street on Boston Ave, downtown Tulsa to the BOK Tower. The resemblance to the World Trade Center Towers is not accidental. It was designed by the same architects and was built in the same way in 1975 when it was the center for The Williams Company. The lobby has marble walls and wall hangings which also have a similarity to the World Trade Center. At 203 m (667 ft) in height, the 52-story tower is the tallest building in Oklahoma and any of the surrounding states of Missouri, Arkansas, New Mexico, Kansas, Nebraska, North Dakota, and South Dakota.