BOK Tower is a skyscraper in Downtown Tulsa, Oklahoma. At 667 feet in height, the 52-story tower was the tallest building in Oklahoma until surpassed by Devon Tower in 2011. It was built in 1976 and designed by Minoru Yamasaki & Associates, the same architect who designed the World Trade Center's Twin Towers in New York City. This structure i…BOK Tower is a skyscraper in Downtown Tulsa, Oklahoma. At 667 feet in height, the 52-story tower was the tallest building in Oklahoma until surpassed by Devon Tower in 2011. It was built in 1976 and designed by Minoru Yamasaki & Associates, the same architect who designed the World Trade Center's Twin Towers in New York City. This structure is based closely on Tower 1; former CEO John Williams liked the design of the WTC so much he hired the same architect to build him a 1/2 scale model of Tower 1.